🐞 `ChannelID.Parameters["fx.start"]` not always a `LogNormal`

### Describe the issue

```
$ python
Python 3.7.9 (default, Feb 28 2023, 14:53:52)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyflp
>>> project = pyflp.parse("2step1.flp")
Traceback (most recent call last):
File "", line 1, in
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/pyflp/__init__.py", line 168, in parse
events.append(event_type(id, value))
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/pyflp/_events.py", line 438, in __init__
self._struct = self.STRUCT.parse(data, len=len(self._data))
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 288, in parse
return self.parse_stream(io.BytesIO(data), **contextkw)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 300, in parse_stream
return self._parsereport(stream, context, "(parsing)")
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 312, in _parsereport
obj = self._parse(stream, context, path)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 2120, in _parse
subobj = sc._parsereport(stream, context, path)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 312, in _parsereport
obj = self._parse(stream, context, path)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 2653, in _parse
return self.subcon._parsereport(stream, context, path)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 312, in _parsereport
obj = self._parse(stream, context, path)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 3739, in _parse
obj = sc._parsereport(stream, context, path)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 312, in _parsereport
obj = self._parse(stream, context, path)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/construct/core.py", line 704, in _parse
return self._decode(obj, context, path)
File "/home/chrism/dev/fakeboy.mapp/.direnv/python-3.7.9/lib/python3.7/site-packages/pyflp/_descriptors.py", line 329, in _decode
raise ValueError(f"Not a LogNormal, 2nd int must be 63; not {obj[1]}")
ValueError: Not a LogNormal, 2nd int must be 63; not 0
```

Here is the file I tried to load:
[2step1.flp.zip](https://github.com/demberto/PyFLP/files/11461539/2step1.flp.zip)

Thank you!

### What version of PyFLP are you using?

2.1.0

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct