Fix a crash in mold
Fix a crash in mold

fix the crash caused by
>> a: make struct! [uint8 a: 1]
>> b: make struct! compose [(a) sa]
>> mold b

zsx/r3,Pointillistic/rebol-lang,Pointillistic/rebol-lang,zsx/r3,Pointillistic/rebol-lang,zsx/r3,zsx/r3,Pointillistic/rebol-lang