SDL Mixer X compile on Windows x86

libs/SDLMixerX/CHANGES.X.txt

libs/SDLMixerX/CHANGES.txt

libs/SDLMixerX/CMakeLists.txt

libs/SDLMixerX/COPYING.txt

libs/SDLMixerX/GPLv2.txt

libs/SDLMixerX/GPLv3.txt

libs/SDLMixerX/README.txt

libs/SDLMixerX/SDL2_mixer_ext.License.txt

libs/SDLMixerX/i686-w64-mingw32/bin/NOTE.txt

libs/SDLMixerX/i686-w64-mingw32/bin/SDL2.dll

libs/SDLMixerX/i686-w64-mingw32/bin/SDL2_mixer_ext.dll

libs/SDLMixerX/i686-w64-mingw32/include/SDL2/SDL_mixer_ext.h

libs/SDLMixerX/i686-w64-mingw32/include/SDL2/begin_code.h

libs/SDLMixerX/i686-w64-mingw32/include/SDL2/close_code.h

...SDLMixerX/i686-w64-mingw32/lib/libSDL2_mixer_ext-static.a

libs/SDLMixerX/i686-w64-mingw32/lib/libSDL2_mixer_ext.dll.a

libs/SDLMixerX/i686-w64-mingw32/lib/libSDL2_mixer_ext.lib

src/sdl/mixer_sound.c

src/win32/Makefile.cfg