Fix getting stuck when clipping on diagonal geometry
Fixes issue #3586
Fix is at pm_shared/pm_shared.c:744, just realized there's a bunch of whitespace trimming.
[!IMPORTANT] pitifully this repository stopped receiving mergers since 2014 to the public becoming outdated, @alfred-valve it seems to no longer belong to the teamauthorized the last one, all its latest current modifications are managed privately.
I can confirm this significantly improves the issue. There is still some sticking on diagonal walls after applying this fix.
Using the example wall in the issue thread and 900fps to increase the frequency it occurs:
https://github.com/ValveSoftware/halflife/assets/6503238/3d664a04-d532-4b5f-8308-956a2ebf5215