Guard against nullptr

source/RobotAPI/libraries/RobotAPIComponentPlugins/DebugDrawerHelperComponentPlugin.cpp

@@ -86,6 +86,13 @@ namespace armarx::plugins
         {
             parent<Component>().getTopicFromProperty(_debugDrawerTopic, _propertyName);
         }
+        if (!_debugDrawerHelper)
+        {
+            _debugDrawerHelper = std::make_unique<DebugDrawerHelper>(
+                                     _debugDrawerTopic,
+                                     getDebugDrawerLayerName(),
+                                     nullptr);
+        }
     }
 
     void DebugDrawerHelperComponentPlugin::postOnConnectComponent()
@@ -101,17 +108,11 @@ namespace armarx::plugins
             _robotStateComponentPlugin->addRobot(robotID,
                                                  VirtualRobot::RobotIO::eStructure);
         }
-        if (_debugDrawerHelper)
-        {
-            _debugDrawerHelper->setDebugDrawer(_debugDrawerTopic);
-        }
-        else
-        {
-            _debugDrawerHelper = std::make_unique<DebugDrawerHelper>(
-                                     _debugDrawerTopic,
-                                     getDebugDrawerLayerName(),
-                                     _robotStateComponentPlugin->getRobot(robotID));
-        }
+        ARMARX_TRACE;
+        _debugDrawerHelper->setDebugDrawer(_debugDrawerTopic);
+        const auto r = _robotStateComponentPlugin->getRobot(robotID);
+        _debugDrawerHelper->setRobot(r);
+        _debugDrawerHelper->setDefaultFrame(r->getRootNode());
     }
 
     void DebugDrawerHelperComponentPlugin::postOnDisconnectComponent()