Fix printing of DictObj
Fix printing of DictObj

a6fbcbaec7027809e9456dd13b3dc3b027377851 introduces a bug in
printing of DictObj. It brokes "weboob-config list",
"weboob-config modules", etc.

sputnick-dev/weboob,nojhan/weboob-devel,frankrousseau/weboob,willprice/weboob,RouxRC/weboob,Boussadia/weboob,yannrouillard/weboob,sputnick-dev/weboob,Konubinix/weboob,laurent-george/weboob,nojhan/weboob-devel,willprice/weboob,laurent-george/weboob,yannrouillard/weboob,Boussadia/weboob,Boussadia/weboob,sputnick-dev/weboob,RouxRC/weboob,Konubinix/weboob,willprice/weboob,yannrouillard/weboob,nojhan/weboob-devel,laurent-george/weboob,Konubinix/weboob,frankrousseau/weboob,Boussadia/weboob,frankrousseau/weboob,RouxRC/weboob