connected.c: free the "struct packed_git"

The "new_pack" we allocate in check_connected() wasn't being
free'd. Let's do that before we return from the function. This has
leaked ever since "new_pack" was added to this function in
c6807a40dcd (clone: open a shortcut for connectivity check,
2013-05-26).

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
diff --git a/connected.c b/connected.c
index 74a20cb..b777082 100644
--- a/connected.c
+++ b/connected.c
@@ -85,6 +85,7 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
 promisor_pack_found:
 			;
 		} while ((oid = fn(cb_data)) != NULL);
+		free(new_pack);
 		return 0;
 	}
 
@@ -118,8 +119,10 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
 	else
 		rev_list.no_stderr = opt->quiet;
 
-	if (start_command(&rev_list))
+	if (start_command(&rev_list)) {
+		free(new_pack);
 		return error(_("Could not run 'git rev-list'"));
+	}
 
 	sigchain_push(SIGPIPE, SIG_IGN);
 
@@ -151,5 +154,6 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
 		err = error_errno(_("failed to close rev-list's stdin"));
 
 	sigchain_pop(SIGPIPE);
+	free(new_pack);
 	return finish_command(&rev_list) || err;
 }