[ft] mac fonts don't load on windows

[Huib-Jan Imbens]

The function Mac_Read_POST_Resource in ftobjs.c both in cvs and in 2.1.10 
contains two obvious bugs:
1. the line
   pfb_pos     = 7;
should read
   pfb_pos     = 6; // sizeof (int) + sizeof (short)

2. the line
   pfb_lenpos = (FT_Byte)pfb_pos;
should read
   pfb_lenpos = pfb_pos; // same types, no cast

After fixing those two bugs my mac fonts load fine again on windows.

Yours,

Huib-Jan