V4L/DVB (4379): Videodev: Check return value of class_device_register() correctly

Errors are return values < 0, not != 0.

Signed-off-by: Trent Piepho <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/video/videodev.c

···
 	vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
 	sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
 	ret = class_device_register(&vfd->class_dev);
-	if (ret) {
+	if (ret < 0) {
 		printk(KERN_ERR "%s: class_device_register failed\n",
 		       __FUNCTION__);
 		goto fail_minor;