media: media/pci/ivtv: Variable vbi.type could be uninitialized if macro...

media: media/pci/ivtv: Variable vbi.type could be uninitialized if macro v4l2_subdev_call set __result an error code

Inside function compress_sliced_buf(), variable vbi.type is
uninitialized if macro v4l2_subdev_call set __result an
error code. However, vbi.type is used in the if statement
without any check, which is potentially unsafe.
Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/pci/ivtv/ivtv-vbi.c

@@ -325,7 +325,7 @@ static u32 compress_raw_buf(struct ivtv *itv, u8 *buf, u32 size)
 static u32 compress_sliced_buf(struct ivtv *itv, u32 line, u8 *buf, u32 size, u8 sav)
 {
 	u32 line_size = itv->vbi.sliced_decoder_line_size;
-	struct v4l2_decode_vbi_line vbi;
+	struct v4l2_decode_vbi_line vbi = {};
 	int i;
 	unsigned lines = 0;