Fix off by-one error spotted by Jan-Olof Hendig
Fix off by-one error spotted by Jan-Olof Hendig

I guess we need more tests.

rakudo/rakudo,tbrowder/rakudo,salortiz/rakudo,tony-o/rakudo,tony-o/rakudo,labster/rakudo,salortiz/rakudo,rakudo/rakudo,rakudo/rakudo,labster/rakudo,tony-o/rakudo,salortiz/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,rakudo/rakudo,rakudo/rakudo,labster/rakudo,tony-o/rakudo,tony-o/rakudo,tbrowder/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,labster/rakudo,labster/rakudo,MasterDuke17/rakudo,labster/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,tony-o/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,salortiz/rakudo,salortiz/rakudo