[PATCH 2/2] read-cache: use time_t instead of unsigned long

["Carlo Marcelo Arenas Belón" <carenas@gmail.com>]

b968372279 ("read-cache: unlink old sharedindex files", 2017-03-06)
introduced get_shared_index_expire_date using unsigned long to track
the modification times of a shared index.

dddbad728c ("timestamp_t: a new data type for timestamps", 2017-04-26)
shows why that might problematic so move to time_t instead.

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
---
 read-cache.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/read-cache.c b/read-cache.c
index 7b1354d759..5525d8e679 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2625,9 +2625,9 @@ static int write_split_index(struct index_state *istate,
 
 static const char *shared_index_expire = "2.weeks.ago";
 
-static unsigned long get_shared_index_expire_date(void)
+static time_t get_shared_index_expire_date(void)
 {
-	static unsigned long shared_index_expire_date;
+	static time_t shared_index_expire_date;
 	static int shared_index_expire_date_prepared;
 
 	if (!shared_index_expire_date_prepared) {
@@ -2643,7 +2643,7 @@ static unsigned long get_shared_index_expire_date(void)
 static int should_delete_shared_index(const char *shared_index_path)
 {
 	struct stat st;
-	unsigned long expiration;
+	time_t expiration;
 
 	/* Check timestamp */
 	expiration = get_shared_index_expire_date();
-- 
2.19.1.856.g8858448bb