fix: return a correct status from Dirs::AddDirectory()

winixd/core/dirs.cpp

@@ -753,7 +753,7 @@ bool Dirs::AddDirectory(Item & item, bool add_to_dir_tab, Item ** pdir, int noti
 		*pdir = 0;
 
 	if( item.type != Item::dir )
-		return WINIX_ERR_DIR_EXPECTED;
+		return false;
 
 	//Error status = db->AddItem(item);
 	//item.set_connector(model_connector);