Bug#315171: gnome-terminal-data: cannot remove if gconf2 removed

[Lee Maguire]

Package: gnome-terminal-data
Version: 2.10.0-2
Severity: normal


It's possible to remove gconf2 before attempting to remove
gnome-terminal-data.

In this scenario gnome-terminal-data.prerm fails because gconftool-2 is
no longer available.  The prerm script needs to check for the existence
of the executable and only run it if it exists.