Clear inventory in addInvItems

src/de/anura/core/API/Inventories.java

@@ -223,6 +223,7 @@ public class Inventories implements Listener {
     }
 
     public static void addInvItems(Player P) {
+        P.getInventory().clear();
         for (Entry<String, Integer> item : itemPositions.entrySet()) {
             P.getInventory().setItem(item.getValue(), getItem(item.getKey(), P));
         }