only copy guid from handler to modifiedHandler if it does not already have one

diff --git a/src/event.js b/src/event.js
index 232fa27..4f63bae 100644 (file)
--- a/src/event.js
+++ b/src/event.js
@@ -66,7 +66,7 @@ jQuery.event = {
                        if ( special.add ) {
                                var modifiedHandler = special.add.call( elem, handler, data, namespaces );
                                if ( modifiedHandler && jQuery.isFunction( modifiedHandler ) ) {
-                                       modifiedHandler.guid = handler.guid;
+                                       modifiedHandler.guid = modifiedHandler.guid || handler.guid;
                                        handler = modifiedHandler;
                                }
                        }