A.GridSelect shouldn't grab keys if there are no choices.
A.GridSelect shouldn't grab keys if there are no choices.


Thanks thermal2008 in #xmonad for bringing up the corner case when gridselect
is run with an empty list of choices.

mathstuf/xmonad-contrib,CaptainPatate/xmonad-contrib,0/xmonad-contrib,f1u77y/xmonad-contrib,0/xmonad-contrib,xmonad/xmonad-contrib,ohlus/xmonad-contrib,mathstuf/xmonad-contrib,0/xmonad-contrib,pjones/xmonad-test,CaptainPatate/xmonad-contrib,CaptainPatate/xmonad-contrib,mathstuf/xmonad-contrib,xmonad/xmonad-contrib,f1u77y/xmonad-contrib,ohlus/xmonad-contrib,ohlus/xmonad-contrib