smooth: Exclude 16-bit system in invalid pitch/height check.

ChangeLog

@@ -1,5 +1,14 @@
 2009-07-31  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
 
+	smooth: Exclude 16-bit system in invalid pitch/height check.
+
+	* src/smooth/ftsmooth.c (ft_smooth_render_generic):
+	pitch and height are typed as FT_UInt but checked to fit
+	16-bit range, to avoid the overflows.  On 16-bit system,
+	this checking inserts a conditional that never occurs.
+
+2009-07-03  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
+
 	cff: Type large constants > 0x7FFF as long for 16-bit systems.
 
 	* src/cff/cffload.c (cff_charset_load): Type large

src/smooth/ftsmooth.c

@@ -196,6 +196,8 @@
 
 #endif
 
+#if FT_UINT_MAX > 0xFFFFU
+
     /* Required check is ( pitch * height < FT_ULONG_MAX ),     */
     /* but we care realistic cases only. Always pitch <= width. */
     if ( width > 0xFFFFU || height > 0xFFFFU )
@@ -205,6 +207,8 @@
       return Smooth_Err_Raster_Overflow;
     }
 
+#endif
+
     bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
     bitmap->num_grays  = 256;
     bitmap->width      = width;