ftobjs.c: Prevent an overflow in glyph index handling.

ChangeLog

@@ -1,3 +1,10 @@
+2009-07-31  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
+
+	ftobjs.c: Prevent an overflow in glyph index handling.
+
+	* src/base/ftobjs.c (FT_Face_GetCharsOfVariant):
+	Improve the cast in comparison to avoid the truncation.
+
 2009-07-31  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
 
 	Improve the variable types in raccess_make_file_name().

src/base/ftobjs.c

@@ -3297,7 +3297,7 @@
       ((FT_Byte*)buffer)[0] = 0;
 
     if ( face                                     &&
-         glyph_index <= (FT_UInt)face->num_glyphs &&
+         (FT_Long)glyph_index <= face->num_glyphs &&
          FT_HAS_GLYPH_NAMES( face )               )
     {
       FT_Service_GlyphDict  service;