lstat() call in rev-parse.c

[Paul Mackerras <paulus@samba.org>]

Why does git-rev-parse do an lstat on some of its arguments, at line
345 of rev-parse.c, and die if the lstat fails?  It doesn't seem to do
anything with the result.

The effect is that if you do "gitk a b", it works as long as a and b
exist (as files or directories), but fails if they don't, and some
users have found this confusing.  Yes they should put in a --, but
it's not obvious to users why this should make it work in the case
when a or b doesn't exist.

(And yes I just took out the git-rev-parse call from gitk, but I'm
going to need to do git-rev-parse --no-refs --no-flags for some
changes I'm doing at the moment.)

Paul.