Real fix for travis-ci build failure (thanks demonstar55!)

common/item_instance.h

@@ -491,7 +491,7 @@ namespace EQEmu
 		//////////////////////////
 		// Protected Members
 		//////////////////////////
-		friend class Inventory;
+		friend class ::Inventory;
 
 		std::map<uint8, ItemInstance*>::const_iterator _cbegin() { return m_contents.cbegin(); }
 		std::map<uint8, ItemInstance*>::const_iterator _cend() { return m_contents.cend(); }