Fixed #962 -- Gave filter-registration decorator a return statement. Thanks, Kieran

git-svn-id: http://code.djangoproject.com/svn/django/trunk@1497 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/template/__init__.py

@@ -828,6 +828,7 @@ class Library(object):
         elif name != None and filter_func != None:
             # register.filter('somename', somefunc)
             self.filters[name] = filter_func
+            return filter_func
         else:
             raise InvalidTemplateLibrary, "Unsupported arguments to Library.filter: (%r, %r, %r)", (name, compile_function, has_arg)