v4lgrab: fix compilation warnings

From: Mauro Carvalho Chehab <mchehab@redhat.com>

Documentation/video4linux/v4lgrab.c: In function ‘main’:
Documentation/video4linux/v4lgrab.c:193: warning: ‘src_depth’ is used uninitialized in this function
Documentation/video4linux/v4lgrab.c:108: warning: ‘b’ may be used uninitialized in this function
Documentation/video4linux/v4lgrab.c:108: warning: ‘g’ may be used uninitialized in this function
Documentation/video4linux/v4lgrab.c:108: warning: ‘r’ may be used uninitialized in this function

Priority: normal

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/linux/Documentation/video4linux/v4lgrab.c b/linux/Documentation/video4linux/v4lgrab.c
index d6e70bef8..05769cff1 100644
--- a/linux/Documentation/video4linux/v4lgrab.c
+++ b/linux/Documentation/video4linux/v4lgrab.c
@@ -105,8 +105,8 @@ int main(int argc, char ** argv)
   struct video_picture vpic;
 
   unsigned char *buffer, *src;
-  int bpp = 24, r, g, b;
-  unsigned int i, src_depth;
+  int bpp = 24, r = 0, g = 0, b = 0;
+  unsigned int i, src_depth = 16;
 
   if (fd < 0) {
     perror(VIDEO_DEV);