Fix exception in config.Screen.resize
Fix exception in config.Screen.resize

Issue 1007 - https://github.com/qtile/qtile/issues/1007

Closes #1007
Closes #1008

tych0/qtile,cortesi/qtile,cortesi/qtile,soulchainer/qtile,qtile/qtile,qtile/qtile,kynikos/qtile,tych0/qtile,ramnes/qtile,flacjacket/qtile,flacjacket/qtile,frostidaho/qtile,zordsdavini/qtile,kynikos/qtile,zordsdavini/qtile,soulchainer/qtile,ramnes/qtile,frostidaho/qtile