./sync-all doesn't properly detect the existence of the 'time' submodule

[parcs]

The time submodule is present in my repository (at ./libraries/time) but some ./sync-all operations, like ./sync-all fetch, don't seem to detect its presence:

Output from ./sync-all get:

...
Submodule 'libraries/time' () registered for path 'libraries/time'
...
== Checking for old time from tarball

Output from a subsequent ./sync-all fetch:

...
== libraries/time repo not present; skipping
...

./sync-all fetch thinks that the time repo is not present and thus doesn't pull in any updates for it.

---

This issue is similar to the one which 31d771bec93b17813b03e7a72a586e1f401ef240 fixes.

[parcs]

a fix

[patrick@…]

commit 146b0eafa17f0ac28f7ef3f273919c4c6a22f45b

Author: Patrick Palka <patrick@parcs.ath.cx>
Date:   Sun Jan 13 12:02:10 2013 -0500

    use -e rather than -d when checking for the existence of a subrepo
    
    The .git file in a submodule's root directory is not necessarily a
    directory, as is the case for the 'time' submodule.
    
    This fixes #7577, where some './sync-all' operations don't detect
    that the 'time' submodule is present in the repository.

 sync-all |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

[igloo]

Thanks for the patch; applied.