GL Initialization needs to happen before window creation,
otherwise the GL library will get reloaded while in use and
Windows will have a heart attack. This is bad, obviously.

This is a massive performance boost on slow processors, because
before, the intermediary buffer had to be swizzled to ABGR8888
before being uploaded -- for large resolutions this was an
enormous performance penalty.

wolfs authored 10 years ago and Alam Ed Arias committed 10 years ago

Switch the Linux symbolic links with manual copy-pastes, should fix compiling on Windows for most users.

Also, fix the issue pointed out by Alam.

Improved fix by changing the formula for how memory is allocated to arbitrary sample rate conversion.

And fix it on FreeBSD, where _BIG_ENDIAN is not a flag indicating
big endian machine, but a constant to compare _BYTE_ORDER to.