Don't include skipped glyphs in combined bitmaps
Don't include skipped glyphs in combined bitmaps

Make sure to correctly handle situations where glyphs
have info->linebreak and info->skip set at the same time.

Fixes libass#44.

Akemi/libass,stps/libass,grigorig/libass,mwgoldsmith/libass,sanyaade-g2g-repos/libass,pigoz/libass-ct,xbmc/libass,pigoz/libass-ct,stps/libass,torque/libass,xbmc/libass,Akemi/libass,libass/libass,astiob/libass,ShiftMediaProject/libass,ShiftMediaProject/libass,libass/libass,mwgoldsmith/libass,MrSmile/libass,sanyaade-g2g-repos/libass,sanyaade-g2g-repos/libass,stps/libass,Akemi/libass,mwgoldsmith/libass,pigoz/libass-ct,MrSmile/libass,torque/libass,grigorig/libass,astiob/libass,torque/libass