Cumulative bugfix update for 2.0.3
- Fix segfault on save file (Gnome bug 645936, #691129)
- Fix crash on exit (Gnome bug 665410, #751535)
- Update patch for #683497 with further changes from upstream; this may also
fix Gnome bug 644495 (#668784, #678737) and 657163 (#732460)