V4L/DVB (10276): cx18, cx2341x, ivtv: Add AC-3 audio encoding control to cx18

Initial addition of controls to set AC-3 audio encoding for the CX23418 - it
does not work yet due to firmware or cx18 driver issues.  This change affects
the common cx2341x and ivtv modules due to shared structures and
common functions.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/ivtv/ivtv-driver.h b/drivers/media/video/ivtv/ivtv-driver.h
index ce8d9b7..94f7f44d 100644
--- a/drivers/media/video/ivtv/ivtv-driver.h
+++ b/drivers/media/video/ivtv/ivtv-driver.h
@@ -696,7 +696,7 @@
 	u64 vbi_data_inserted;          /* number of VBI bytes inserted into the MPEG stream */
 	u32 last_dec_timing[3];         /* cache last retrieved pts/scr/frame values */
 	unsigned long dualwatch_jiffies;/* jiffies value of the previous dualwatch check */
-	u16 dualwatch_stereo_mode;      /* current detected dualwatch stereo mode */
+	u32 dualwatch_stereo_mode;      /* current detected dualwatch stereo mode */
 
 
 	/* VBI state info */