* image.c (gif_load): Fix omitted cast error introduced by 2011-06-06 change.

src/ChangeLog

+2011-06-10  Chong Yidong  <cyd@stupidchicken.com>
+
+	* image.c (gif_load): Fix omitted cast error introduced by
+	2011-06-06 change.
+
 2011-06-10  Martin Rudalics  <rudalics@gmx.at>
 
 	* window.h (resize_proportionally, orig_total_lines)

src/image.c

@@ -7238,7 +7238,7 @@ gif_load (struct frame *f, struct image *img)
 	      /* From gif89a spec: 1 = "keep in place", 2 = "restore
 		 to background".  Treat any other value like 2.  */
 	      disposal = (extblock->Bytes[0] >> 2) & 7;
-	      transparency_color_index = extblock->Bytes[3];
+	      transparency_color_index = (unsigned char) extblock->Bytes[3];
 	      break;
 	    }
 	}