Fix "unused variable" compiler warnings in C ops
Fix "unused variable" compiler warnings in C ops

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