run-command: use internal argv_array of struct child_process in run_hook_ve()

Use the existing argv_array member instead of providing our own.  This
way we don't have to initialize or clean it up explicitly.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

run-command.c

@@ -770,28 +770,21 @@ char *find_hook(const char *name)
 int run_hook_ve(const char *const *env, const char *name, va_list args)
 {
 	struct child_process hook;
-	struct argv_array argv = ARGV_ARRAY_INIT;
 	const char *p;
-	int ret;
 
 	p = find_hook(name);
 	if (!p)
 		return 0;
 
-	argv_array_push(&argv, p);
-
-	while ((p = va_arg(args, const char *)))
-		argv_array_push(&argv, p);
-
 	memset(&hook, 0, sizeof(hook));
-	hook.argv = argv.argv;
+	argv_array_push(&hook.args, p);
+	while ((p = va_arg(args, const char *)))
+		argv_array_push(&hook.args, p);
 	hook.env = env;
 	hook.no_stdin = 1;
 	hook.stdout_to_stderr = 1;
 
-	ret = run_command(&hook);
-	argv_array_clear(&argv);
-	return ret;
+	return run_command(&hook);
 }
 
 int run_hook_le(const char *const *env, const char *name, ...)