[FFmpeg-cvslog] xcbgrab: Support empty filename string correctly

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Wed Nov 26 06:20:52 2014 +0100| [2c3f29c4894ee50635b846f202296ad79a7c0d33] | committer: Luca Barbato

xcbgrab: Support empty filename string correctly

Bug-Id: CID 1254664
CC: libav-stable at libav.org

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2c3f29c4894ee50635b846f202296ad79a7c0d33
---

 libavdevice/xcbgrab.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavdevice/xcbgrab.c b/libavdevice/xcbgrab.c
index 5055fde..243ece4 100644
--- a/libavdevice/xcbgrab.c
+++ b/libavdevice/xcbgrab.c
@@ -594,10 +594,10 @@ static av_cold int xcbgrab_read_header(AVFormatContext *s)
     int screen_num, ret;
     const xcb_setup_t *setup;
 
-    c->conn = xcb_connect(s->filename, &screen_num);
+    c->conn = xcb_connect(s->filename[0] ? s->filename : NULL, &screen_num);
     if ((ret = xcb_connection_has_error(c->conn))) {
         av_log(s, AV_LOG_ERROR, "Cannot open display %s, error %d.\n",
-               s->filename ? s->filename : "default", ret);
+               s->filename[0] ? s->filename : "default", ret);
         return AVERROR(EIO);
     }
     setup = xcb_get_setup(c->conn);