Bug 454683 - Media element setVolume should fail on invalid values; "bustage fix" fix :->

content/media/video/test/test_volume.html

@@ -18,7 +18,7 @@ function test(element, value, shouldThrow) {
   try {
     element.volume = value;
   } catch (err if (err instanceof Components.interfaces.nsIException &&
-                   err.result == Components.results.NS_ERROR_DOM_INDEX_SIZE_ERR) {
+                   err.result == Components.results.NS_ERROR_DOM_INDEX_SIZE_ERR)) {
     threw = true;
   }
   is(shouldThrow, threw, "Case: " +element.id+ " setVolume=" + value);