Windows: Fix display of default JavaScript dialogs (issue #760).

git-svn-id: https://chromiumembedded.googlecode.com/svn/branches/2272@2068 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser/javascript_dialog_win.cc

@@ -80,7 +80,7 @@ INT_PTR CALLBACK CefJavaScriptDialog::DialogProc(HWND dialog,
       break;
     }
     default:
-      return DefWindowProc(dialog, message, wparam, lparam);
+      break;
   }
   return 0;
 }