Do not recursively GC bare series
Do not recursively GC bare series

The BARE flag is supposed to designate the series doesn't link to
GC'able elements. However, this is not used anywhere except the new
t-struct.c, so it shouldn't break anything.

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