[FFmpeg-cvslog] avdevice/xcbgrab: fix -Wunused-variable

[Ganesh Ajjanagadde]

ffmpeg | branch: master | Ganesh Ajjanagadde <gajjanagadde at gmail.com> | Fri Sep 18 18:17:42 2015 -0400| [6a817ac1e9a0d2b747f71abc5345a54434ceb4a2] | committer: Michael Niedermayer

avdevice/xcbgrab: fix -Wunused-variable

This patch fixes a -Wunused-variable reported in e.g
http://fate.ffmpeg.org/log.cgi?time=20150918194649&log=compile&slot=x86_64-debian-asan-144800.
av_unused is used as opposed to a header guard for readability.

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6a817ac1e9a0d2b747f71abc5345a54434ceb4a2
---

 libavdevice/xcbgrab.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavdevice/xcbgrab.c b/libavdevice/xcbgrab.c
index f169f93..2da7ec7 100644
--- a/libavdevice/xcbgrab.c
+++ b/libavdevice/xcbgrab.c
@@ -591,7 +591,7 @@ static void setup_window(AVFormatContext *s)
     uint32_t values[] = { 1,
                           XCB_EVENT_MASK_EXPOSURE |
                           XCB_EVENT_MASK_STRUCTURE_NOTIFY };
-    xcb_rectangle_t rect = { 0, 0, c->width, c->height };
+    av_unused xcb_rectangle_t rect = { 0, 0, c->width, c->height };
 
     c->window = xcb_generate_id(c->conn);