fix for #112970. timer problem with animated gif with frame larger than header screen size.

This fix should allow a graceful handling of error. pnunn

modules/libimg/src/gif.c

@@ -638,11 +638,10 @@ gif_delay_time_callback(void *closure)
 
     XP_ASSERT(gs->state == gif_delay);
 
-    gs->delay_timeout = NULL;
-
     if (gs->ic->state == IC_ABORT_PENDING)
         return;
-                                        
+    
+    gs->delay_timeout = NULL;
     gs->delay_time = 0;         /* Reset for next image */
 
     if (gs->state == gif_delay) {
@@ -1492,12 +1491,14 @@ il_gif_write(il_container *ic, const uint8 *buf, int32 len)
         case gif_error: 
             ILTRACE(2,("il:gif: reached error state"));
             ic->state=IC_ABORT_PENDING;
+
             return MK_IMAGE_LOSSAGE;
             break;
 
         default: 
             ILTRACE(0,("il:gif: unknown state"));
             ic->state=IC_ABORT_PENDING;
+
             XP_ASSERT(0);
             break;
 		}