gnome-panel patch to remove error message

[Nate Nielsen <nielsen-list memberwebs com>]

Here's a patch which removes a loud gnome-panel error message. This
mesasge occurs when an icon is missing for a launcher. In some cases
(such as after an upgrade) the user can be inundated with these. The
dialog is displayed on login, theme changes etc...

A 'missing' (usually a question mark) icon is also displayed on the
launcher, so the error message does not seem necessary.

Patch: http://bugzilla.gnome.org/attachment.cgi?id=50363&action=view
Bug: http://bugzilla.gnome.org/show_bug.cgi?id=100964
Screenie: http://bugzilla.gnome.org/attachment.cgi?id=50287&action=view

Okay to commit?

Cheers,
Nate


Note: Yup, this the mailing list listed in gnome-panel/HACKING for
gnome-panel patches.