Merge pull request #1037 from greezybacon/issue/signal-byref

signals: pass variable by reference

Reviewed-By: Peter & Jared

include/class.signal.php

@@ -93,9 +93,9 @@ class Signal {
             list($s, $callable, $check) = $sub;
             if ($s && !is_a($object, $s))
                 continue;
-            elseif ($check && !call_user_func($check, $object, $data))
+            elseif ($check && !call_user_func_array($check, array($object, $data)))
                 continue;
-            call_user_func($callable, $object, $data);
+            call_user_func_array($callable, array($object, $data));
         }
     }
 }