[PATCH] pull.sh: quote $upload_pack when passing it to git-fetch

[Matthieu Moy <Matthieu.Moy@imag.fr>]

The previous code broke for example

  git pull --upload-pack 'echo --foo'

Reported-by: Joey Hess <id@joeyh.name>
Fix-suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
---
Junio wrote:
> ${upload_pack+"$upload_pack"} or something.

Indeed, we need to pass nothing, not the empty string if $upload_pack
is not defined.

This should fix it.

 git-pull.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/git-pull.sh b/git-pull.sh
index a814bf6..26c5e9f 100755
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -295,7 +295,7 @@ test true = "$rebase" && {
 }
 orig_head=$(git rev-parse -q --verify HEAD)
 git fetch $verbosity $progress $dry_run $recurse_submodules $all $append \
-$upload_pack $force $tags $prune $keep $depth $unshallow $update_shallow \
+${upload_pack+"$upload_pack"} $force $tags $prune $keep $depth $unshallow $update_shallow \
 $refmap --update-head-ok "$@" || exit 1
 test -z "$dry_run" || exit 0
 
-- 
2.5.0.rc0.7.ge1edd74.dirty