fix: platform observer didn't receive platform velocity

source/RobotAPI/components/units/PlatformUnit.cpp

@@ -38,7 +38,7 @@ namespace armarx
 
         def->topic(odometryPrx);
         def->topic(globalPosePrx);
-        def->topic(listenerPrx, listenerChannelName, "");
+        // def->topic(listenerPrx, listenerChannelName, "");
 
         def->component(robotStateComponent);
 
@@ -59,6 +59,8 @@ namespace armarx
 
     void PlatformUnit::onConnectComponent()
     {
+                listenerPrx = getTopic<PlatformUnitListenerPrx>(listenerChannelName);
+
         this->onStartPlatformUnit();
     }
 

source/RobotAPI/components/units/RobotUnit/Units/PlatformSubUnit.cpp

@@ -134,7 +134,7 @@ namespace armarx
 
             // legacy interface
             const auto& vel = odomVelocity.twist;
-            // listenerPrx->reportPlatformVelocity(vel.linear.x(), vel.linear.y(), vel.angular.z());
+            listenerPrx->reportPlatformVelocity(vel.linear.x(), vel.linear.y(), vel.angular.z());
         }
     }