fixed Exception when slugify german umlauts
fixed Exception when slugify german umlauts

jneves/wok,jneves/wok,wummel/wok,edunham/wok,algor512/wok,gchriz/wok,chrplace/wok,Avaren/wok,moreati/wok,mythmon/wok,chrplace/wok,gchriz/wok,jneves/wok,vaygr/wok,edunham/wok,moreati/wok,chrplace/wok,matt-garman/wok,matt-garman/wok,edunham/wok,abbgrade/wok,algor512/wok,moreati/wok,wummel/wok,mythmon/wok,Avaren/wok,vaygr/wok,algor512/wok,Avaren/wok,matt-garman/wok,abbgrade/wok,gchriz/wok,mythmon/wok,vaygr/wok