core: When reporting errors in the AVM2 constructor from MovieClip, also report the name of the class being constructed.

core/src/display_object/movie_clip.rs

@@ -1836,7 +1836,14 @@ impl<'gc> MovieClip<'gc> {
             let result: Result<(), Avm2Error> = constr_thing();
 
             if let Err(e) = result {
-                log::error!("Got {} when constructing AVM2 side of movie clip", e);
+                log::error!(
+                    "Got {} when constructing AVM2 side of movie clip of type {}",
+                    e,
+                    class_object
+                        .try_inner_class_definition()
+                        .map(|c| c.read().name().to_qualified_name(context.gc_context))
+                        .unwrap_or_else(|_| "[BorrowError!]".into())
+                );
             }
         }
     }