[truetype] Fix regression in the incremental glyph loader.

* src/truetype/ttgload.c (load_truetype_glyph): For incremental
fonts, the glyph index may be greater than the number of glyphs
indicated, so guard the check with a preprocessor conditional.

ChangeLog

@@ -1,3 +1,11 @@
+2015-02-06  Jon Anderson  <jon@websupergoo.com>
+
+	[truetype] Fix regression in the incremental glyph loader.
+
+	* src/truetype/ttgload.c (load_truetype_glyph): For incremental
+	fonts, the glyph index may be greater than the number of glyphs
+	indicated, so guard the check with a preprocessor conditional.
+
 2015-02-06  Werner Lemberg  <wl@gnu.org>
 
 	[autofit] Fix potential memory leak.

src/truetype/ttgload.c

@@ -1425,12 +1425,14 @@
       goto Exit;
     }
 
+#ifndef FT_CONFIG_OPTION_INCREMENTAL
     /* check glyph index */
     if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
     {
       error = FT_THROW( Invalid_Glyph_Index );
       goto Exit;
     }
+#endif
 
     loader->glyph_index = glyph_index;