git-repack: resist stray environment variable

The script used $args and $existing without initializing it to empty.  It
would have been confused by an environment variable the end user had
before running it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-repack.sh b/git-repack.sh
index 458a497..8600015 100755 (executable)
--- a/git-repack.sh
+++ b/git-repack.sh
@@ -60,6 +60,7 @@ case ",$all_into_one," in
        args='--unpacked --incremental'
        ;;
 ,t,)
+       args= existing=
        if [ -d "$PACKDIR" ]; then
                for e in `cd "$PACKDIR" && find . -type f -name '*.pack' \
                        | sed -e 's/^\.\///' -e 's/\.pack$//'`