longer relevant because of the XPVGV re-ordering.
p4raw-id: //depot/perl@29662
(In fact, GP ends up pointing at a previous GP structure, because the
principle cause of the padding in XPVMG getting garbage is a copy of
- sizeof(XPVMG) bytes from a XPVGV structure in sv_unglob)
+ sizeof(XPVMG) bytes from a XPVGV structure in sv_unglob. Right now
+ this happens to be moot because XPVGV has been re-ordered, with GP
+ no longer after STASH)
So we are careful and work out the size of used parts of all the
structures. */