network_setup: supplement to b5b4439f1d

Origin commit data
------------------
Commit: 5faae93e83
Author: Jacek Jendrzej <overx300@gmail.com>
Date: 2020-01-22 (Wed, 22 Jan 2020)

src/gui/network_setup.cpp

@@ -389,7 +389,9 @@ int CNetworkSetup::showNetworkSetup()
 
 	dhcpDisable.Clear();
 	wlanEnable.Clear();
+#ifdef ENABLE_GUI_MOUNT
 	delete netfsMountGui;
+#endif
 	delete networkSettings;
 	delete sectionsdConfigNotifier;
 	return ret;