make gpr_timespec platform agnostic
diff --git a/src/core/security/credentials.c b/src/core/security/credentials.c
index 543c750..cbaec7d 100644
--- a/src/core/security/credentials.c
+++ b/src/core/security/credentials.c
@@ -511,9 +511,9 @@
"grpc_service_account_jwt_access_credentials_create("
"json_key=%s, "
"token_lifetime="
- "gpr_timespec { tv_sec: %ld, tv_nsec: %d, clock_type: %d }, "
+ "gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
"reserved=%p)",
- 5, (json_key, (long)token_lifetime.tv_sec, token_lifetime.tv_nsec,
+ 5, (json_key, (long long)token_lifetime.tv_sec, (int)token_lifetime.tv_nsec,
(int)token_lifetime.clock_type, reserved));
GPR_ASSERT(reserved == NULL);
return grpc_service_account_jwt_access_credentials_create_from_auth_json_key(