Change $.noop return type from function to undefined

Fixes #195

Author: kswedberg

entries/jQuery.noop.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<entry type="method" name="jQuery.noop" return="Function">
+<entry type="method" name="jQuery.noop" return="undefined">
   <title>jQuery.noop()</title>
   <signature>
     <added>1.4</added>
@@ -11,4 +11,4 @@
   </longdesc>
   <category slug="utilities"/>
   <category slug="version/1.4"/>
-</entry>
+</entry>