use SDL_Threads everywhere
The trick was to mark the threaded functions as cdecl and load arguments correctly. This allows us to:
- drop a few ifdefs;
- use integrated waiting code;
- remove some whitespaces \o/;
- fix
bug #591.
#! /usr/bin/sed -nf
s/^#define *FREETYPE_MAJOR *\([^ ][^ ]*\).*$/freetype_major="\1" ;/p
s/^#define *FREETYPE_MINOR *\([^ ][^ ]*\).*$/freetype_minor=".\1" ;/p
s/^#define *FREETYPE_PATCH *\([^ ][^ ]*\).*$/freetype_patch=".\1" ;/p