Fix error in ObserverItemModel::getPropertiesWidget

source/ArmarXGui/gui-plugins/ObserverPropertiesPlugin/ObserverItemModel.cpp

@@ -102,7 +102,7 @@ QWidget* ObserverItemModel::getPropertiesWidget(const QModelIndex& index, QWidge
 
             // create widget
             DatafieldRefPtr ref = DatafieldRefPtr::dynamicCast(entry.identifier);
-            if (info && !entry.value->data || entry.value->data->ice_id() == "::armarx::VariantData")
+            if (info && (!entry.value->data || entry.value->data->ice_id() == "::armarx::VariantData"))
             {
                 ARMARX_INFO << "Variant Factory for " << entry.typeName << " is missing - trying to load lib now";
                 auto lib = info->loadLibraryOfVariant(entry.typeName);