The x11grab input refuses to capture the full screen claiming the capture area is outside the screen size

[es]

It seems the the following commit broke fullscreen recording with x11grab:
​http://git.videolan.org/?p=ffmpeg.git;a=commit;h=9ccaeff67a3b0f75f7f25c39c5d373b560dcfb19

How to reproduce:

$ xrandr
Screen 0: minimum 8 x 8, current 1280 x 720, maximum 32767 x 3276
[...]

$ ffmpeg -f x11grab -framerate 30 -threads 0 -s 1280x720 -i :0 capture.mp4
[x11grab @ 0x16a0a60] Capture area 1280x720 at position 0.0 outside the screen size 1280x720
:0: Invalid argument

$ ffmpeg -version
ffmpeg version 2.6.3 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.2 (GCC) 20150304 (prerelease)
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-avresample --enable-fontconfig --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-shared --enable-version3 --enable-x11grab --enable-libfdk_aac --enable-nonfree
libavutil      54. 20.100 / 54. 20.100
libavcodec     56. 26.100 / 56. 26.100
libavformat    56. 25.101 / 56. 25.101
libavdevice    56.  4.100 / 56.  4.100
libavfilter     5. 11.102 /  5. 11.102
libavresample   2.  1.  0 /  2.  1.  0
libswscale      3.  1.101 /  3.  1.101
libswresample   1.  1.100 /  1.  1.100
libpostproc    53.  3.100 / 53.  3.100

These lines in libavdevice/xcbgrab.c

    if (c->x + c->width >= geo->width ||
        c->y + c->height >= geo->height) {

should be changed to

    if (c->x + c->width > geo->width ||
        c->y + c->height > geo->height) {

which fixes the problem for me.

[es]

It seems this already has been fixed in this commit:
​http://git.videolan.org/?p=ffmpeg.git;a=commit;h=7971fa9ce0ead8d2e8a79dbe422e91dcef8222ba