Merge pull request 'Fix trace Rserver null error ?' (#237) from trace/server-nullpointer-fix into master

Reviewed-on: #237
Reviewed-by: YoyoNow <jwsteam@nidido.de>

BauSystem_Main/src/de/steamwar/bausystem/features/tracer/Trace.java

@@ -188,7 +188,19 @@ public class Trace {
      * @param playerTraceShowData The showData for modifying the rendering
      */
     protected void render(List<TNTPoint> records, Player player, PlayerTraceShowData playerTraceShowData) {
-        render(records, entityServerMap.get(player), playerTraceShowData);
+        REntityServer entityServer = entityServerMap.computeIfAbsent(player, k -> {
+            REntityServer newEntityServer = new REntityServer();
+            newEntityServer.addPlayer(k);
+            newEntityServer.setCallback((p, rEntity, entityAction) -> {
+                if (entityAction != REntityServer.EntityAction.INTERACT) return;
+                if (rEntity instanceof TraceEntity) {
+                    ((TraceEntity) rEntity).printIntoChat(p);
+                }
+            });
+            return newEntityServer;
+        });
+
+        render(records, entityServer, playerTraceShowData);
     }
 
     /**