Improve location for dupe trait warning
Improve location for dupe trait warning

Original pointed to end of routine (or end of file?). Fix to
point at the start of dupe trait definition.

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