[cff] Ignore CID > 0xFFFFU.
See Savannah bug #30975.

* src/cff/cffload.c (cff_charset_compute_cids): Ignore CID if
greater than 0xFFFFU.  CFF font spec does not mention about
maximum CID in the font, but PostScript and PDF spec define
that maximum CID is 0xFFFFU.
2 files changed