Fix memory leak when config conversion fails (#3006)
Fix memory leak when config conversion fails (#3006)

This happens on an empty config file, for example.
Airblader/i3,Airblader/i3-original,stapelberg/i3,stapelberg/i3,Airblader/i3,Airblader/i3-original,Airblader/i3,stapelberg/i3,i3/i3,Airblader/i3-original,i3/i3,Airblader/i3-original,i3/i3,Airblader/i3-original,i3/i3,Airblader/i3,stapelberg/i3