Better fades

src/d_main.c

src/f_finale.h

src/f_wipe.c

src/hardware/hw_drv.h

src/hardware/hw_main.c

src/hardware/hw_main.h

src/hardware/r_opengl/r_opengl.c

src/m_menu.c

src/p_setup.c

src/r_data.c

src/r_data.h

src/r_state.h

src/sdl/hwsym_sdl.c

src/sdl/i_video.c

src/win32/win_dll.c