fix argument checking
fix argument checking

knu/hammerspoon,knu/hammerspoon,cmsj/hammerspoon,cmsj/hammerspoon,CommandPost/CommandPost-App,cmsj/hammerspoon,latenitefilms/hammerspoon,latenitefilms/hammerspoon,Hammerspoon/hammerspoon,zzamboni/hammerspoon,asmagill/hammerspoon,Hammerspoon/hammerspoon,bradparks/hammerspoon,CommandPost/CommandPost-App,cmsj/hammerspoon,Habbie/hammerspoon,knu/hammerspoon,CommandPost/CommandPost-App,zzamboni/hammerspoon,CommandPost/CommandPost-App,Hammerspoon/hammerspoon,cmsj/hammerspoon,asmagill/hammerspoon,latenitefilms/hammerspoon,zzamboni/hammerspoon,Habbie/hammerspoon,zzamboni/hammerspoon,knu/hammerspoon,asmagill/hammerspoon,CommandPost/CommandPost-App,asmagill/hammerspoon,zzamboni/hammerspoon,cmsj/hammerspoon,latenitefilms/hammerspoon,latenitefilms/hammerspoon,Habbie/hammerspoon,Hammerspoon/hammerspoon,Hammerspoon/hammerspoon,knu/hammerspoon,asmagill/hammerspoon,knu/hammerspoon,bradparks/hammerspoon,asmagill/hammerspoon,bradparks/hammerspoon,latenitefilms/hammerspoon,CommandPost/CommandPost-App,Habbie/hammerspoon,bradparks/hammerspoon,Habbie/hammerspoon,zzamboni/hammerspoon,Hammerspoon/hammerspoon,bradparks/hammerspoon,Habbie/hammerspoon