Fix $recce->progress() on negative arg: t+
Fix $recce->progress() on negative arg: t+

Issue reported by Jean-Damien Durand.

jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/kollos,jeffreykegler/kollos,jeffreykegler/kollos,pczarn/kollos,jeffreykegler/kollos,jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/libmarpa,jeffreykegler/libmarpa,pczarn/kollos,pczarn/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos