Fix refname termination.

When a new ref is being pushed, the name of it was not
terminated properly.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

connect.c

@@ -169,7 +169,7 @@ static int match_explicit_refs(struct ref *src, struct ref *dst,
 				/* pushing "master:master" when
 				 * remote does not have master yet.
 				 */
-				int len = strlen(matched_src->name);
+				int len = strlen(matched_src->name) + 1;
 				matched_dst = xcalloc(1, sizeof(*dst) + len);
 				memcpy(matched_dst->name, matched_src->name,
 				       len);