Gtk+ freeze break request

[Marek Kasik <mkasik redhat com>]

Bug 693200 - Printing via evince crashes badly when /tmp is not writable
 - https://bugzilla.gnome.org/show_bug.cgi?id=693200

This is a simple fix which prevents gtk print dialog from crashing if
/tmp is not writable. It also shows correct information that getting of
printer details failed (it doesn't change UI or any string).

The patch consists of initialization of 2 pointers, 1 check for correct
signal id and 1 move of initialization of the state of getting of
printer details (see the comment #7).

The patch has been already accepted.

Regards

Marek