[PATCH v4 0/1] MR9375: opengl32: Avoid null pointer dereferences when filtering extensions.

[Tim Clem (＠tclem)]

Fixes: 2127e9ae7d90466f3b8883708799047214409832

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Fixes a crash on macOS. Perhaps the extensions string regularly has a trailing space on other platforms?
The previous filter_extensions_list method set `end` differently and avoided this case.

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  v4: opengl32: Avoid null pointer dereferences when filtering extensions.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/9375