Improve MacOS fond support. Provide a new API
`FT_New_Face_From_FSSpec' similar to `FT_New_Face'.
* src/base/ftmac.c [__MWERKS__]: Include FSp_fpopen.h.
STREAM_FILE [__MWERKS__]: New macro.
(ft_FSp_stream_close, ft_FSp_stream_io) [__MWERKS__]: New functions.
(file_spec_from_path) [__MWERKS__]: Updated #if statement.
(get_file_type, make_lwfn_spec): Use `const' for argument.
(is_dfont) [TARGET_API_MAC_CARBON]: Removed.
(count_face_sfnt, count_faces): New functions.
(parse_fond): Do some range checking.
(read_lwfn): Change type of second argument.
No longer call FSpOpenResFile.
(OpenFileAsResource): New function.
(FT_New_Face_From_LWFN): Use `const' for second argument.
Use OpenFileAsResource.
(FT_New_Face_From_Suitcase): Change type of second argument.
No longer call FSpOpenResFile.
Loop over all resource indices.
(FT_New_Face_From_dfont) [TARGET_API_MAC_CARBON]: Removed.
(FT_GetFile_From_Mac_Name): Use `const' for first argument.
(ResourceForkSize): Removed.
(FT_New_Face): Updated to use new functions.
(FT_New_Face_From_FSSpec): New function.
* include/freetype/ftmac.h: Updated.