从screen虚拟终端出来.vim滚动显示异常.

windTerm版本2.5.0 prerelease版本
只要进入screen 再出来,vim上下滚动会出现显示异常, htop显示异常.
必现bug

机器信息
```
1.机器1
[invir62159 ~]$ uname -a
Linux invir62159 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
[invir62159 ~]$ screen -v
Screen version 4.00.03 (FAU) 23-Oct-06
[invir62159 ~]$ cat /etc/redhat-release
CentOS release 6.5 (Final)
2.机器2
[root]➜ ~ cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core)
[root]➜ ~ uname -a
Linux izbp1imvnbq7nafxv2ixngz 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[root]➜ ~ screen -v
Screen version 4.01.00devel (GNU) 2-May-06
```


Reproduce the display issue in WindTerm 2.5.0 prerelease by entering and leaving screen, then scrolling in vim and viewing htop on the listed CentOS systems. Compare terminal rendering before and after leaving screen; done means both applications display correctly after the transition. No source files or tests are named, so the rendering entry point must first be located.

Written by the indexing model from the issue text.