Entering a webpage asking for a login, when there are more than one logins
for it saved in the password manager, makes Galeon crash.

To reproduce:
1) Go to a webpage requiring a login. I have succesfully reproduced this at
http://games.swirve.com/earth/ and
http://lc2.law13.hotmail.passport.com/cgi-bin/login

2) Enter a username and password and save them in the password manager. The
login doesn't need to be valid.

3) Go to the same login page and enter another username-password pair. Save
this in the password manager.

4) Go to the login page again. Galeon should crash when the page has loaded.

Results: Galeon crashed, according to the crash popup screen due a
segmentation fault.

Expected results: Galeon should provide a list with the logins saved for
the site and let user choose the login to use.

Occurs on: Galeon 0.12.1

Doesn't occur on: Mozilla 0.9.4+