Correct warning in newer GCC (compare different pointers)
Correct warning in newer GCC (compare different pointers)

This commit fixes a warning found on a new installation of GCC, but is more for
testing that the GitHub configuration for committing works on that machine.

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