iterate_bvec(): expand bvec.h macro forest, massage a bit

... incidentally, using pointer instead of index in an array
(the only change here) trims half-kilobyte of .text...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2021-04-26 20:19:14 -04:00
commit 7491a2bf64