Merge branch 'fix-slope-plane-distortion' into 'next'

src/CMakeLists.txt

src/Sourcefile

src/lua_maplib.c

src/m_fixed.c

src/m_fixed.h

src/m_vector.c

src/m_vector.h

src/p_saveg.c

src/p_setup.c

src/p_slopes.c

src/p_slopes.h

src/r_defs.h

src/r_draw.c

src/r_draw.h

src/r_fps.c

src/r_plane.c

src/r_segs.c

src/sdl/Srb2SDL-vc10.vcxproj

src/sdl/Srb2SDL-vc10.vcxproj.filters

src/tables.c