[PATCH] git-sh-setup.sh: use dashdash with basename call

Calling basename on a argument that starts with a dash, like a login shell,
will result in an error. This patch adds '--' before the argument so that the
argument is interpreted properly.

Signed-off-by: Dan Wyand <redacted>
---
 git-sh-setup.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 9447980..5cdae33 100644
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh

@@ -81,7 +81,7 @@ if test -n "$OPTIONS_SPEC"; then
 		echo exit $?
 	)"
 else
-	dashless=$(basename "$0" | sed -e 's/-/ /')
+	dashless=$(basename -- "$0" | sed -e 's/-/ /')
 	usage() {
 		die "usage: $dashless $USAGE"
 	}

-- 
2.1.3