Bug 1012624 - Add missing return in test_navigator_language.html r=Ms2ger

dom/base/test/test_navigator_language.html

@@ -60,6 +60,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=889335
     if (currentTestIdx >= tests.length) {
       tearDown();
       SimpleTest.finish();
+      return;
     }
 
     tests[currentTestIdx]();