V4L/DVB (12795): tm6000: Fix buffering size

At the first time an application were called, resolutions were wrong.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/tm6000/tm6000-video.c

@@ -1102,6 +1102,10 @@ static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *norm)
 	struct tm6000_core *dev = fh->dev;
 
 	rc=tm6000_set_standard (dev, norm);
+
+	fh->width  = dev->width;
+	fh->height = dev->height;
+
 	if (rc<0)
 		return rc;