Don't use memcpy() to fill in parent context values
Don't use memcpy() to fill in parent context values

It is no longer legal to bit-copy arbitrary values from one cell to
another without masking out the "formatting" bits of that cell.  This
masking is done by Move_Value() and Derelativize().

Some code inside of constructing contexts that "inherit" from other
contexts was written to use a raw memcpy() and hadn't been revisited.
This changes it to a Move_Value() loop.

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