Comment 5 for bug 1293287

Pushed to master in:
commit 318996b92055b1ed40cff4bd35f4534e0db3dcc3
Author: Eric Koegel <email address hidden>
Date: Fri Aug 1 10:03:27 2014 +0300

    Add a --next option to force wallpaper changes (Bug 10754)

    Several users have external scripts telling xfdesktop when to
    change the wallpaper. This patch adds a --next option so that
    users can advance the wallpaper on the current workspace when
    they want with those scripts, rather than being limited to only
    the time based events that are built into xfdesktop.

http://git.xfce.org/xfce/xfdesktop/commit/?id=318996b92055b1ed40cff4bd35f4534e0db3dcc3