git-push.sh: Retain cuteness, add helpfulness.

Signed-off-by: Chris Shoemaker <c.shoemaker at cox.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

git-push.sh

@@ -28,7 +28,8 @@ do
 done
 case "$#" in
 0)
-	die "Where would you want to push today?" ;;
+	echo "Where would you want to push today?"
+        usage ;;
 esac
 
 . git-parse-remote