[sfnt] Restrict POST version 1.0.

A font has surfaced with `post` version 1.0 and fewer than 258 glyphs.
Its glyphs did not correspond to their names. We now reject such `post`
strictly following specifications.

* src/sfnt/ttpost.c (tt_face_get_ps_name): Check the number of glyphs
for version 1.0.
1 file changed