SRB2 2.1.12 release

src/r_main.h

src/r_plane.c

src/r_plane.h

src/r_segs.c

src/r_state.h

src/r_things.c

src/r_things.h

src/s_sound.c

src/sdl/i_cdmus.c

src/sdl/i_video.c

src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj

src/sdl12/SRB2CE/cehelp.c

src/sdl12/macosx/Srb2mac.xcodeproj/project.pbxproj

src/sounds.c

src/st_stuff.c

src/v_video.c

src/w_wad.c

src/win32/Makefile.cfg

src/y_inter.c