[cff] Handle underline position and thickness as integers.

This is done for consistency with Type 1 fonts.

* include/freetype/internal/cfftypes.h (CFF_FontRecDic): Change
the variable types.
* include/cff/cfftoken.h (CFF_FontRecDic): Change the parsing macros.
* src/cff/cffobjs.c (cff_face_init), src/cff/cffload.c (cff_subfont_load),
src/cff/cffdrivr.c (cff_ps_get_font_info): Update users.
5 files changed