parse-remote: typofix

An earlier patch had a trivial typo that two people did not notice.
Pointed out by Michael Schubert.

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

git-parse-remote.sh

@@ -56,7 +56,7 @@ get_remote_url () {
 
 get_default_remote () {
 	curr_branch=$(git symbolic-ref -q HEAD)
-	curr_branch="${cur_branch#refs/heads/}"
+	curr_branch="${curr_branch#refs/heads/}"
 	origin=$(git config --get "branch.$curr_branch.remote")
 	echo ${origin:-origin}
 }