Remove one nqp::isnull straggler
Remove one nqp::isnull straggler

Hashes now *always* have a descriptor

tony-o/rakudo,tony-o/rakudo,softmoth/rakudo,labster/rakudo,nbrown/rakudo,salortiz/rakudo,softmoth/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,salortiz/rakudo,tbrowder/rakudo,labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,labster/rakudo,Gnouc/rakudo,salortiz/rakudo,nbrown/rakudo,Gnouc/rakudo,tbrowder/rakudo,tony-o/rakudo,salortiz/rakudo,softmoth/rakudo,tbrowder/rakudo,labster/rakudo,tbrowder/rakudo,salortiz/rakudo,nbrown/rakudo,rakudo/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,tony-o/rakudo,tony-o/rakudo,tony-o/rakudo,labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo,rakudo/rakudo,nbrown/rakudo,labster/rakudo,softmoth/rakudo,salortiz/rakudo,nbrown/rakudo,softmoth/rakudo,nbrown/rakudo,rakudo/rakudo,Gnouc/rakudo,tbrowder/rakudo,rakudo/rakudo