core/Map.carp: use Bucket.find in Map.update[-with-default]
core/Map.carp: use Bucket.find in Map.update[-with-default]

to not look up the key in the bucket twice

eriksvedang/Carp,carp-lang/Carp,eriksvedang/Carp,carp-lang/Carp,carp-lang/Carp