Fix rogue emergency stop button

But gui segfaults on startup

source/ArmarXGui/applications/ArmarXGui/Widgets/EmergencyStopWidget.cpp

@@ -110,21 +110,20 @@ namespace armarx
         ARMARX_INFO << "SS2 widget connected.";
         emergencyStopMasterPrx = getProxy<EmergencyStopMasterInterfacePrx>(EMERGENCY_STOP_PROXY);
         QMetaObject::invokeMethod(button, "setVisible", Qt::QueuedConnection, Q_ARG(bool, true));
+        EmergencyStopState state = EmergencyStopState::eEmergencyStopActive;
 
         try
         {
-            QMetaObject::invokeMethod(
-                this,
-                "setChecked",
-                Qt::QueuedConnection,
-                Q_ARG(EmergencyStopState, emergencyStopMasterPrx->getEmergencyStopState()));
+            state = emergencyStopMasterPrx->getEmergencyStopState();
         }
         catch (Ice::Exception const& e)
         {
             ARMARX_ERROR << "Could not query SS2 state." << deactivateSpam(2);
-            setChecked(EmergencyStopState::eEmergencyStopActive);
         }
 
+        QMetaObject::invokeMethod(
+            this, "setChecked", Qt::QueuedConnection, Q_ARG(EmergencyStopState, state));
+
         emit startPeriodicStateUpdate();
     }