[Bug 36592] Crash when clicking New Printer twice

[Adam Wiggins]

Public bug reported:
https://launchpad.net/malone/bugs/36592

Affects: gnome-cups-manager (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
Running System -> Administration -> Printing for the first time, then
double clicking New Printer once, then double clicking again, caused
"The application gnome-cups-manager has quit unexpectedly."  It looks
like it has a delay as it searches for printers, during which time the
user might think they failed to click correctly the first time and try
again - but the second instance invoked crashes.