font: ignore bearing for strikes
font: ignore bearing for strikes

This is more robust and simpler. The bearing calculations initially
were bugged, but getting rid of them completely seems better. It is
consistent with other text renderers as well. To simplify things, also
move striking before the additional scale is applied and get rid of the
half-pixel overlapping thing; it is not needed with additive blending.

Fixes #193.

Akemi/libass,MrSmile/libass,stps/libass,ShiftMediaProject/libass,Akemi/libass,MrSmile/libass,Akemi/libass,stps/libass,stps/libass,ShiftMediaProject/libass,mwgoldsmith/libass,xbmc/libass,mwgoldsmith/libass,astiob/libass,astiob/libass,grigorig/libass,libass/libass,libass/libass,mwgoldsmith/libass,xbmc/libass,grigorig/libass