staging: go7007: Remove NULL check before kfree

This patch was generated by the following semantic patch:
// <smpl>
@@ expression E; @@
- if (E != NULL) { kfree(E); }
+ kfree(E);

@@ expression E; @@
- if (E != NULL) { kfree(E); E = NULL; }
+ kfree(E);
+ E = NULL;
// </smpl>

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/go7007/go7007-usb.c

@@ -1247,15 +1247,13 @@ static void go7007_usb_disconnect(struct usb_interface *intf)
 		vurb = usb->video_urbs[i];
 		if (vurb) {
 			usb_kill_urb(vurb);
-			if (vurb->transfer_buffer)
-				kfree(vurb->transfer_buffer);
+			kfree(vurb->transfer_buffer);
 			usb_free_urb(vurb);
 		}
 		aurb = usb->audio_urbs[i];
 		if (aurb) {
 			usb_kill_urb(aurb);
-			if (aurb->transfer_buffer)
-				kfree(aurb->transfer_buffer);
+			kfree(aurb->transfer_buffer);
 			usb_free_urb(aurb);
 		}
 	}