Roster position is set to (-32000, -32000)
Bug description
Preferences roster_x-position and roster_y-postion are sometimes set to -32000, so the roster window cannot be displayed on screen. If I set roster_x-position and roster_y-postion to some values that belong to my screen, I can see the roster again after closing and opening it.
Steps to reproduce
Normal use: opening and closing roster window.
Software versions
OS version: Windows XP SP3 GTK version: 2.16.5 PyGTK version: 2.12.1