usb: core: fix below build warning

linux-2.6/drivers/usb/core/hub.c: In function 'usb_disconnect':
linux-2.6/drivers/usb/core/hub.c:2110: warning: 'hub' may be used uninitialized in this function
linux-2.6/drivers/usb/core/hub.c:2111: warning: 'port1' may be used uninitialized in this function
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/core/hub.c

@@ -2107,8 +2107,8 @@ void usb_disconnect(struct usb_device **pdev)
 {
 	struct usb_port *port_dev = NULL;
 	struct usb_device *udev = *pdev;
-	struct usb_hub *hub;
-	int port1;
+	struct usb_hub *hub = NULL;
+	int port1 = 1;
 
 	/* mark the device as inactive, so any further urb submissions for
 	 * this device (and any of its children) will fail immediately.