ArViz: Prevent crash if layer with selected element is hidden

source/RobotAPI/components/ArViz/Coin/Visualizer.cpp

@@ -507,6 +507,12 @@ namespace coin
             // Layer is currently visible
             if (!visible)
             {
+                // If we hide a layer wit a selected element, Coin will crash during rendering
+                // So we check if the selected element is in the layer to be hidden
+                if (selectedElement && selectedElement->layer == id)
+                {
+                    selection->deselectAll();
+                }
                 root->removeChild(childIndex);
             }
         }