-move tex_codec stuff out of tex.cpp and into tex_codec.cpp
-tex_codec: use linked list of codecs instead of array (simplifies code
and removes limit)
-ogl_tex: add override mechanism for s3tc/automipmapgen extension detect
-tired of keeping of debug_warn text in sync with function name; now use
__func__ everywhere (and emulate that with __FUNCTION__ on MSC)
-add ONCE_NOT (opposite of ONCE)
-fix 3!! stupid bugs in ia32_control87, its caller and the header that
were canceling each other out. float exceptions now enabled except for
"inexact result" (too common). (update: nicolai had already fixed 2 of
these)
This was SVN commit r2964.
