FIX: The end of item cheating

src/world/item/ItemInstance.cpp

@@ -290,3 +290,7 @@ bool ItemInstance::isArmorItem( const ItemInstance* instance ) {
 
 	return item->isArmor();
 }
+
+bool ItemInstance::isBlock(const ItemInstance* instance) {
+    return instance->id < 256;
+}

src/world/item/ItemInstance.h

@@ -81,6 +81,8 @@ public:
 
 	static bool isArmorItem(const ItemInstance* instance);
 
+    static bool isBlock(const ItemInstance* instance);
+
     /**
      * Checks if this item is the same item as the other one, disregarding the
      * 'count' value.