Reduce warnings for MS Visual Studio 2010.

* src/autofit/afhints.c (af_glyph_hints_get_num_segments,
af_glyph_hints_get_segment_offset) [!FT_DEBUG_AUTOFIT]: Provide
return value.
* src/cff/cffgload.c (cff_slot_load): Add cast.
* src/truetype/ttobjs.c (tt_check_trickyness_sfnt_ids): Use proper
loop variable type.
4 files changed