[PATCH 3/3] reftable tests: avoid "int" overflow, use "uint64_t"

[Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>]

Change code added in 1ae2b8cda84 (reftable: add merged table view,
2021-10-07) to consistently use the "uint64_t" type. These "min" and
"max" variables get passed in the body of this function to a function
whose prototype is:

    [...] reftable_writer_set_limits([...], uint64_t min, uint64_t max

This avoids the following warning on SunCC 12.5 on
gcc211.fsffrance.org:

    "reftable/merged_test.c", line 27: warning: initializer does not fit or is out of range: 0xffffffff

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 reftable/merged_test.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/reftable/merged_test.c b/reftable/merged_test.c
index 24461e8a802..b87ff495dfd 100644
--- a/reftable/merged_test.c
+++ b/reftable/merged_test.c
@@ -24,8 +24,8 @@ license that can be found in the LICENSE file or at
 static void write_test_table(struct strbuf *buf,
 			     struct reftable_ref_record refs[], int n)
 {
-	int min = 0xffffffff;
-	int max = 0;
+	uint64_t min = 0xffffffff;
+	uint64_t max = 0;
 	int i = 0;
 	int err;
 
-- 
2.35.0.rc0.844.gb5945183dcf