it's not necessary for timer.h to include sdl
it's not necessary for timer.h to include sdl

AMDmi3/TwinklebearDev-Lessons,AMDmi3/TwinklebearDev-Lessons-libSDL2pp,Twinklebear/TwinklebearDev-Lessons,libSDL2pp/TwinklebearDev-Lessons-libSDL2pp