Add clarifying comment.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42375 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp

@@ -1077,6 +1077,10 @@ VariablesView::VariableTableModel::_AddNode(Variable* variable,
 				== TYPE_ADDRESS
 			&& nodeChildRawType->Kind() == TYPE_COMPOUND) {
 			node->SetHidden(true);
+
+			// we need to tell the listener about nodes like this so any
+			// necessary actions can be taken for them (i.e. value resolution),
+			// since they're otherwise invisible to outsiders.
 			NotifyNodeHidden(node);
 		}
 	}