* src/cff/cffdrivr/c (cff_get_ps_name): Avoid unnecessary crash.

The situation can happen if `FT_New_Face` (or one of its siblings) is called
with a negative index to get the number of contained faces, followed
immediately by a call to `FT_Get_Postscript_Name`.  While this is not a valid
use of the FreeType library there is no need for a crash.

Fixes #1219.
1 file changed