Fix dirty Flaging

BauSystem_Main/src/de/steamwar/bausystem/tracer/trace/ShowManager.java

@@ -1,6 +1,7 @@
 package de.steamwar.bausystem.tracer.trace;
 
 import de.steamwar.bausystem.tracer.TNTTracer15;
+import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 
 import java.util.HashMap;
@@ -16,9 +17,9 @@ public class ShowManager {
     }
 
     public static void dirty() {
-        for (Map.Entry<Player, ShowStatus> entry : showMap.entrySet()) {
-            if (entry.getValue().getShow() != ShowStatus.Show.NONE) {
-                entry.getValue().dirty = true;
+        for (Player player : Bukkit.getOnlinePlayers()) {
+            if (showMap.get(player).getShow() != ShowStatus.Show.NONE) {
+                showMap.get(player).dirty = true;
             }
         }
     }