Empty LockMutexFuncton ?
libX11 library two function not implemented

LockMutexFunction
UnlockMutexFunction

https://github.com/FEX-Emu/FEX/blob/9eaa45f92223ad4eecbe07df0529d8e4d15a7215/ThunkLibs/libX11/libX11_Guest.cpp#L153-L159

when I run gl test program, it print much error info, is it ok?