Avoid a failed assertion when calling RANDOM on a BLOCK! (#672)
Avoid a failed assertion when calling RANDOM on a BLOCK! (#672)

The RANDOM function shuffles a BLOCK! by swapping values
at random positions. An assertion was failing when a
value was being swapped with itself.
rgchris/ren-c,giuliolunati/ren-c,giuliolunati/ren-c,codebybrett/ren-c,kealist/ren-c,codebybrett/ren-c,codebybrett/ren-c,rgchris/ren-c,hostilefork/rebol,draegtun/ren-c,kealist/ren-c,giuliolunati/ren-c,codebybrett/ren-c,draegtun/ren-c,hostilefork/rebol,hostilefork/rebol,hostilefork/rebol,draegtun/ren-c,kealist/ren-c,giuliolunati/ren-c,rgchris/ren-c,rgchris/ren-c,draegtun/ren-c,codebybrett/ren-c,hostilefork/rebol,codebybrett/ren-c,draegtun/ren-c,draegtun/ren-c,kealist/ren-c,kealist/ren-c,rgchris/ren-c,giuliolunati/ren-c,kealist/ren-c,hostilefork/rebol