[PATCH 20/23] builtin/maintenance: fix leaking config string

[Patrick Steinhardt <ps@pks.im>]

When parsing the maintenance strategy from config we allocate a config
string, but do not free it after parsing it. Plug this leak by instead
using `git_config_get_string_tmp()`, which does not allocate any memory.

This leak is exposed by t7900, but plugging it alone does not make the
test suite pass.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 builtin/gc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/builtin/gc.c b/builtin/gc.c
index 7dac9714054..3acfa367ad1 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -1476,9 +1476,9 @@ static int maintenance_run_tasks(struct maintenance_run_opts *opts,
 
 static void initialize_maintenance_strategy(void)
 {
-	char *config_str;
+	const char *config_str;
 
-	if (git_config_get_string("maintenance.strategy", &config_str))
+	if (git_config_get_string_tmp("maintenance.strategy", &config_str))
 		return;
 
 	if (!strcasecmp(config_str, "incremental")) {
-- 
2.46.0.551.gc5ee8f2d1c.dirty