Fixes the following problem, which occurs in some configuration circumstances:
Traceback (most recent call last):
File "/nix/store/k4bvykaynrhhm8zp6y4c0ib3qa7ikcjg-mcomix3-1.2.1+gc5afd370/bin/.mcomixstarter.py-wrapped", line 34, in <module>
mcomix.run.run()
File "/nix/store/k4bvykaynrhhm8zp6y4c0ib3qa7ikcjg-mcomix3-1.2.1+gc5afd370/bin/mcomix/run.py", line 92, in run
preferences.read_preferences_file()
File "/nix/store/k4bvykaynrhhm8zp6y4c0ib3qa7ikcjg-mcomix3-1.2.1+gc5afd370/bin/mcomix/preferences.py", line 170, in read_preferences_file
check_old_preferences(saved_prefs)
File "/nix/store/k4bvykaynrhhm8zp6y4c0ib3qa7ikcjg-mcomix3-1.2.1+gc5afd370/bin/mcomix/preferences.py", line 147, in check_old_preferences
if saved_prefs['scaling quality']==3:
KeyError: 'scaling quality'
Fixes the following problem, which occurs in some configuration circumstances: