live(): The parameter is optional.

Closes gh-589.

Author: AurelioDeRosa

entries/live.xml

@@ -17,7 +17,7 @@
     <argument name="events" type="String">
       <desc>A string containing a JavaScript event type, such as "click" or "keydown." As of jQuery 1.4 the string can contain multiple, space-separated event types or custom event names.</desc>
     </argument>
-    <argument name="data" type="PlainObject">
+    <argument name="data" type="PlainObject" optional="true">
       <desc>An object containing data that will be passed to the event handler.</desc>
     </argument>
     <argument name="handler" type="Function">