updates

source/train/XWorkerUpdate.cpp

@@ -89,7 +89,8 @@ void XWorkerUpdate::Update(XList * args)
     XTensorKeeper * paramKeeper = (XTensorKeeper*)args->GetItem(paramCount++);
     XOptimizer * optimizer = (XOptimizer*)args->GetItem(paramCount++);
 
-    if(updater != NULL)
+    CheckNTErrors(updater != NULL, "No updater!");
+
     updater->UpdateParameter(paramKeeper, optimizer);
 }