core: Enqueue current frame on registration

Author: nivkner

core/src/display_object/movie_clip.rs

@@ -2193,7 +2193,10 @@ impl<'gc> MovieClip<'gc> {
             frame_scripts[index] = None;
         }
         if frame_id == current_frame {
+            // Ensure newly registered frame scripts are executed,
+            // even if the frame is repeated due to goto.
             write.last_queued_script_frame = None;
+            write.queued_script_frame = Some(current_frame);
         }
     }
 
@@ -2647,6 +2650,7 @@ impl<'gc> TDisplayObject<'gc> for MovieClip<'gc> {
                             write.frame_scripts.get(frame_id as usize).cloned()
                         {
                             write.last_queued_script_frame = Some(frame_id);
+                            write.queued_script_frame = None;
                             write.set_flag(MovieClipFlags::EXECUTING_AVM2_FRAME_SCRIPT, true);
 
                             drop(write);