USB: g_printer, fix empty if statement

A bug every C programmer makes at some point in time...
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Signed-off-by: NCraig W. Nadler <craig@nadler.us>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/printer.c

@@ -1299,7 +1299,7 @@ printer_unbind(struct usb_gadget *gadget)
 		printer_req_free(dev->in_ep, req);
 	}
 
-	if (dev->current_rx_req != NULL);
+	if (dev->current_rx_req != NULL)
 		printer_req_free(dev->out_ep, dev->current_rx_req);
 
 	while (!list_empty(&dev->rx_reqs)) {