V4L/DVB: video: testing unsigned for less than 0

soc_mbus_bytes_per_line() returns -EINVAL on error but we store it in an
unsigned int so the test for less than zero doesn't work.  I think it
always returns "small" positive values so we can just cast it to int
here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/sh_mobile_ceu_camera.c

@@ -1633,7 +1633,7 @@ static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
 	height = pix->height;
 
 	pix->bytesperline = soc_mbus_bytes_per_line(width, xlate->host_fmt);
-	if (pix->bytesperline < 0)
+	if ((int)pix->bytesperline < 0)
 		return pix->bytesperline;
 	pix->sizeimage = height * pix->bytesperline;