Location list shown as listed buffer

## Information

**VIM version**

```
VIM - Vi IMproved 8.1 (2018 May 18, compiled Nov 13 2018 21:39:48)
macOS version
Included patches: 1-280
Compiled by MacPorts
Huge version without GUI. Features included (+) or not (-):
+acl +extra_search +mouse_netterm +tag_old_static
+arabic +farsi +mouse_sgr -tag_any_white
+autocmd +file_in_path -mouse_sysmouse -tcl
+autochdir +find_in_path +mouse_urxvt +termguicolors
-autoservername +float +mouse_xterm +terminal
-balloon_eval +folding +multi_byte +terminfo
+balloon_eval_term -footer +multi_lang +termresponse
-browse +fork() -mzscheme +textobjects
++builtin_terms +gettext +netbeans_intg +timers
+byte_offset -hangul_input +num64 +title
+channel +iconv +packages -toolbar
+cindent +insert_expand +path_extra +user_commands
-clientserver +job -perl +vartabs
+clipboard +jumplist +persistent_undo +vertsplit
+cmdline_compl +keymap +postscript +virtualedit
+cmdline_hist +lambda +printer +visual
+cmdline_info +langmap +profile +visualextra
+comments +libcall -python +viminfo
+conceal +linebreak +python3 +vreplace
+cryptv +lispindent +quickfix +wildignore
+cscope +listcmds +reltime +wildmenu
+cursorbind +localmap +rightleft +windows
+cursorshape -lua -ruby +writebackup
+dialog_con +menu +scrollbind -X11
+diff +mksession +signs -xfontset
+digraphs +modify_fname +smartindent -xim
-dnd +mouse +startuptime -xpm
-ebcdic -mouseshape +statusline -xsmp
+emacs_tags +mouse_dec -sun_workshop -xterm_clipboard
+eval -mouse_gpm +syntax -xterm_save
+ex_extra -mouse_jsbterm +tag_binary
system vimrc file: "/opt/local/etc/vimrc"
user vimrc file: "$HOME/.vimrc"
2nd user vimrc file: "~/.vim/vimrc"
user exrc file: "$HOME/.exrc"
defaults file: "$VIMRUNTIME/defaults.vim"
fall-back for $VIM: "/opt/local/share/vim"
Compilation: /usr/bin/clang -c -I. -Iproto -DHAVE_CONFIG_H -I/opt/local/include -DMACOS_X -DMACOS_X_DARWIN -pipe -Os -arch x86_64 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: /usr/bin/clang -L/opt/local/lib -Wl,-headerpad_max_install_names -arch x86_64 -o vim -lm -lncurses -liconv -lintl -framework AppKit -L/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/config-3.6m-darwin -lpython3.6m -framework CoreFoundation
```

Operating System: macOS mojave 10.14.1

## What went wrong

Location list appears as a listed buffer instead of its default behaviour of being an unlisted buffer. So when switching between buffers (using `:bn` or `:bp`) and wrapping around (i.e. after the last buffer on the buffer list), the location list buffer is shown. This only happens when ALE is present in my list of plugings, if it's not present then the issue doen't occur.

## Reproducing the bug

1. Start vim
2. Open a couple of files (`:e [filename]`)
3. `:bn` until the last buffer
4. After the last buffer `:bn` goes to the location list which I think isn't the expected behaviour

### :ALEInfo

```
Current Filetype: python
Available Linters: ['flake8', 'mypy', 'prospector', 'pycodestyle', 'pyflakes', 'pylint', 'pyls', 'pyre', 'vulture']
Enabled Linters: ['flake8', 'mypy', 'pylint']
Suggested Fixers:
'add_blank_lines_for_python_control_statements' - Add blank lines before control statements.
'autopep8' - Fix PEP8 issues with autopep8.
'black' - Fix PEP8 issues with black.
'isort' - Sort Python imports with isort.
'remove_trailing_lines' - Remove all blank lines at the end of a file.
'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.
'yapf' - Fix Python files with yapf.
Linter Variables:

let g:ale_python_flake8_auto_pipenv = 0
let g:ale_python_flake8_change_directory = 1
let g:ale_python_flake8_executable = 'flake8'
let g:ale_python_flake8_options = ''
let g:ale_python_flake8_use_global = 0
let g:ale_python_mypy_auto_pipenv = 0
let g:ale_python_mypy_executable = 'mypy'
let g:ale_python_mypy_ignore_invalid_syntax = 0
let g:ale_python_mypy_options = ''
let g:ale_python_mypy_use_global = 0
let g:ale_python_pylint_auto_pipenv = 0
let g:ale_python_pylint_change_directory = 1
let g:ale_python_pylint_executable = 'pylint'
let g:ale_python_pylint_options = ''
let g:ale_python_pylint_use_global = 0
Global Variables:

let g:ale_cache_executable_check_failures = v:null
let g:ale_change_sign_column_color = 0
let g:ale_command_wrapper = ''
let g:ale_completion_delay = v:null
let g:ale_completion_enabled = 0
let g:ale_completion_max_suggestions = v:null
let g:ale_echo_cursor = 1
let g:ale_echo_msg_error_str = 'Error'
let g:ale_echo_msg_format = '%code: %%s'
let g:ale_echo_msg_info_str = 'Info'
let g:ale_echo_msg_warning_str = 'Warning'
let g:ale_enabled = 1
let g:ale_fix_on_save = 0
let g:ale_fixers = {}
let g:ale_history_enabled = 1
let g:ale_history_log_output = 1
let g:ale_keep_list_window_open = 0
let g:ale_lint_delay = 200
let g:ale_lint_on_enter = 1
let g:ale_lint_on_filetype_changed = 1
let g:ale_lint_on_insert_leave = 0
let g:ale_lint_on_save = 1
let g:ale_lint_on_text_changed = 'never'
let g:ale_linter_aliases = {}
let g:ale_linters = {}
let g:ale_linters_explicit = 0
let g:ale_list_vertical = 0
let g:ale_list_window_size = 10
let g:ale_loclist_msg_format = '%code: %%s'
let g:ale_max_buffer_history_size = 20
let g:ale_max_signs = -1
let g:ale_maximum_file_size = v:null
let g:ale_open_list = 1
let g:ale_pattern_options = v:null
let g:ale_pattern_options_enabled = v:null
let g:ale_set_balloons = 0
let g:ale_set_highlights = 1
let g:ale_set_loclist = 1
let g:ale_set_quickfix = 0
let g:ale_set_signs = 1
let g:ale_sign_column_always = 1
let g:ale_sign_error = '>>'
let g:ale_sign_info = '--'
let g:ale_sign_offset = 1000000
let g:ale_sign_style_error = '>>'
let g:ale_sign_style_warning = '--'
let g:ale_sign_warning = '--'
let g:ale_statusline_format = v:null
let g:ale_type_map = {}
let g:ale_use_global_executables = v:null
let g:ale_virtualtext_cursor = 0
let g:ale_warn_about_trailing_blank_lines = 1
let g:ale_warn_about_trailing_whitespace = 1
Command History:

(executable check - success) flake8
(finished - exit code 0) ['/bin/bash', '-c', '''flake8'' --version']
(executable check - failure) mypy
(executable check - failure) pylint
(finished - exit code 1) ['/bin/bash', '-c', 'cd ''/University/University-of-Edinburgh/Courses/MLP/mlpractical/mlp'' && ''flake8'' --format=default --stdin-display-name ''/University/University-of-Edinburgh/Courses/MLP/mlpractical/mlp/data_providers.py'' - < ''/var/folders/dq/pc9156z1727gxcpzmyydsk6h0000gn/T/vpXLGrH/5/data_providers.py''']

<<>>
/University/University-of-Edinburgh/Courses/MLP/mlpractical/mlp/data_providers.py:8:1: F401 'pickle' imported but unused
/University/University-of-Edinburgh/Courses/MLP/mlpractical/mlp/data_providers.py:9:1: F401 'gzip' imported but unused
/University/University-of-Edinburgh/Courses/MLP/mlpractical/mlp/data_providers.py:136:1: E302 expected 2 blank lines, found 1
/University/University-of-Edinburgh/Courses/MLP/mlpractical/mlp/data_providers.py:202:1: E302 expected 2 blank lines, found 1
/University/University-of-Edinburgh/Courses/MLP/mlpractical/mlp/data_providers.py:322:1: E302 expected 2 blank lines, found 1
/University/University-of-Edinburgh/Courses/MLP/mlpractical/mlp/data_providers.py:355:12: E714 test for object identity should be 'is not'
<<>>
```