Fix uninitilalized "scheme map" variable
Fix uninitilalized "scheme map" variable

The map being iterated over in this loop was never initialized,
which would have likely crashed if this code ever needed to
run...which it seems it does not.  Fixed.

Found by clang static analyzer.

hostilefork/rebol,rgchris/ren-c,codebybrett/ren-c,kealist/ren-c,kealist/ren-c,draegtun/ren-c,hostilefork/rebol,rgchris/ren-c,rgchris/ren-c,rgchris/ren-c,codebybrett/ren-c,giuliolunati/ren-c,giuliolunati/ren-c,codebybrett/ren-c,hostilefork/rebol,draegtun/ren-c,codebybrett/ren-c,kealist/ren-c,kealist/ren-c,giuliolunati/ren-c,codebybrett/ren-c,hostilefork/rebol,hostilefork/rebol,codebybrett/ren-c,rgchris/ren-c,giuliolunati/ren-c,draegtun/ren-c,giuliolunati/ren-c,kealist/ren-c,hostilefork/rebol,draegtun/ren-c,draegtun/ren-c,kealist/ren-c,draegtun/ren-c