Proper error message when fixture controller is called without input

before: failed with undefined index PHP error
now: fail with proper error complaining about missing argument.

framework/console/controllers/FixtureController.php

@@ -100,7 +100,7 @@ class FixtureController extends Controller
      *
      * @throws Exception if the specified fixture does not exist.
      */
-    public function actionLoad()
+    public function actionLoad($fixturesInput)
     {
         $fixturesInput = func_get_args();
         $filtered = $this->filterFixtures($fixturesInput);