Try to fix it at another place

Author: pzgulyas

Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/TrainControlSystem.cs

@@ -670,17 +670,19 @@ SignalFeatures NextGenericSignalFeatures(string signalFunctionTypeName, int item
                     }
 
                     var functionHead = default(SignalHead);
-                    if (trainSignal?.SignalObject?.SignalHeads != null)
-                        foreach (var head in trainSignal.SignalObject.SignalHeads)
-                            if (head.Function == function)
-                                functionHead = head;
+                    foreach (var head in trainSignal.SignalObject.SignalHeads)
+                        if (head.Function == function)
+                            functionHead = head;
                     signalTypeName = functionHead.SignalTypeName;
-                    foreach (var key in functionHead.signalType.DrawStates.Keys)
+                    if (functionHead?.signalType?.DrawStates != null)
                     {
-                        if (functionHead.signalType.DrawStates[key].Index == functionHead.draw_state)
+                        foreach (var key in functionHead.signalType.DrawStates.Keys)
                         {
-                            drawStateName = functionHead.signalType.DrawStates[key].Name;
-                            break;
+                            if (functionHead.signalType.DrawStates[key].Index == functionHead.draw_state)
+                            {
+                                drawStateName = functionHead.signalType.DrawStates[key].Name;
+                                break;
+                            }
                         }
                     }
                     textAspect = functionHead?.TextSignalAspect ?? "";