InventoryData - chestOpenTime

Adds the variable to check when a player opens a chest

NCPCore/src/main/java/fr/neatmonster/nocheatplus/checks/inventory/InventoryData.java

@@ -34,6 +34,7 @@ public class InventoryData extends ACheckData {
 
     // General.
     public long     lastClickTime = 0;
+    public long     chestOpenTime = 0;
 
     // Data of the drop check.
     public int      dropCount;