GUACAMOLE-526: Ignore failure to load OSK layout.

guacamole/src/main/webapp/app/osk/directives/guacOsk.js

@@ -113,7 +113,7 @@ angular.module('osk').directive('guacOsk', [function guacOsk() {
                             $rootScope.$broadcast('guacSyntheticKeyup', keysym);
                         };
 
-                    });
+                    }, angular.noop);
 
                 }