Send Inventory packet on event, don't check it at each AsyncRunStep.

* Call UpdateCrafting into SendInventory because this functions is only called before SendInventory
* Use Player* instead of peer_id for UpdateCrafting because SendInventory already has the Player* pointer, then don't loop for searching Player* per peer_id
* m_env_mutex don't need to be used with this modification because it's already locked before the calls

src/script/lua_api/l_object.cpp

@@ -355,6 +355,9 @@ int ObjectRef::l_set_wielded_item(lua_State *L)
 	// Do it
 	ItemStack item = read_item(L, 2, getServer(L));
 	bool success = co->setWieldedItem(item);
+	if (success && co->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
+		getServer(L)->SendInventory(((PlayerSAO*)co)->getPeerID());
+	}
 	lua_pushboolean(L, success);
 	return 1;
 }