V4L/DVB (4628): Fix VIDIOC_ENUMSTD ioctl in videodev.c

Do not return -EINVAL for index=0 in VIDIOC_ENUMSTD, because it is a
valid index
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/videodev.c

@@ -836,7 +836,7 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
 			break;
 		}
 
-		if (index < 0 || index >= vfd->tvnormsize) {
+		if (index<0 || index >= vfd->tvnormsize) {
 			ret=-EINVAL;
 			break;
 		}