USB: fix omninet memory leak found by coverity

the transfer of allocating the descriptor in attach and no longer in open
was incomplete resulting in a memory leak coverity spotted. This fix
is against the patch set you posted.
Signed-off-by: NOliver Neukum <oneukum@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/omninet.c

@@ -165,12 +165,10 @@ static int omninet_open (struct usb_serial_port *port, struct file *filp)
 {
 	struct usb_serial	*serial = port->serial;
 	struct usb_serial_port	*wport;
-	struct omninet_data	*od = usb_get_serial_port_data(port);
 	int			result = 0;
 
 	dbg("%s - port %d", __FUNCTION__, port->number);
 
-	od = kmalloc( sizeof(struct omninet_data), GFP_KERNEL );
 	wport = serial->port[1];
 	wport->tty = port->tty;