V4L/DVB (3291): Fix signed/unsigned bug in hue handling

- Fix signed/unsigned bug in hue handling (set to -127 and 129 was returned).

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c
index d7ece6e..b93495b 100644
--- a/drivers/media/video/cx25840/cx25840-core.c
+++ b/drivers/media/video/cx25840/cx25840-core.c
@@ -466,7 +466,7 @@
 		ctrl->value = cx25840_read(client, 0x420) >> 1;
 		break;
 	case V4L2_CID_HUE:
-		ctrl->value = cx25840_read(client, 0x422);
+		ctrl->value = (s8)cx25840_read(client, 0x422);
 		break;
 	case V4L2_CID_AUDIO_VOLUME:
 	case V4L2_CID_AUDIO_BASS: