Comment 3 for bug 1071082

Results in crash with these steps:

Steps to reproduce in current trunk:
1) default (new) prefs:
   mv ~/.config/inkscape{,-bkp}
2) launch inkscape (without document)
3) open 'Edit > Undo history'
4) quit inkscape, relaunch
5) edit current doc (draw rectangle)
6) close window (Ctrl+W)
--> in new empty doc, 'Undo' history has old entries
7) click on top-most entry in 'Undo' history ([Unchanged])
--> crash