Corrected a variety of wrong-arg-type error messages for map-image, build-image, et al.
Corrected a variety of wrong-arg-type error messages for map-image,
build-image, et al.

Please merge to release branch.

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket