[m-rev.] diff: fix mdb "level"

[Zoltan Somogyi]

2020-09-28 11:13 GMT+10:00 "Peter Wang" <novalazy at gmail.com>:
> Hmm, maybe it would be more useful for level to print the current level.

Maybe, but any difference in usability would be negligible, since on-one has
reported the bug in two decades :-(  In any case, I don't think the level number
is useful *by itself*; to make it useful, you need to know what call is on each level.
Maybe the "stack" command should print the current ancestor level, at least
if it is not zero.

Zoltan.