Fix A_COMPLEMENT test for REB_BINARY
Fix A_COMPLEMENT test for REB_BINARY

An artifact of implementation the old Do_Next implementation was
covering up the fact that the IS_BINARY() tests the wrong thing.
COMPLEMENT is unary, there isn't supposed to be a D_ARG(2)
so this asserts in the stricter StableStack branch.

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