Debugger: Fix type value display in VariablesView.

- When retrieving the type to display for a given model node, ask its
  underlying value node for its corresponding type rather than relying
  on the one initially stored in the model, as the latter can change
  as a result of typecasts.

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

@@ -1428,7 +1428,10 @@ VariablesView::VariableTableModel::GetValueAt(void* object, int32 columnIndex,
 			return true;
 		case 2:
 		{
-			Type* type = node->GetType();
+			// use the type of the underlying value node, as it may
+			// be different from the initially assigned top level type
+			// due to casting
+			Type* type = node->NodeChild()->Node()->GetType();
 			if (type == NULL)
 				return false;