[Linux] Make sure memory is free'd
[Linux] Make sure memory is free'd

Memory could leak if output/error reading failed

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