From a1b762c65fe5bc309bbbec8be2873a660e905a62 Mon Sep 17 00:00:00 2001
From: rr- <rr-@sakuya.pl>
Date: Mon, 1 May 2017 20:26:53 +0200
Subject: [PATCH] api: fix getting cached disk usage with empty dirs

---
 server/szurubooru/api/info_api.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/szurubooru/api/info_api.py b/server/szurubooru/api/info_api.py
index 97bfa390..c21ba9d1 100644
--- a/server/szurubooru/api/info_api.py
+++ b/server/szurubooru/api/info_api.py
@@ -14,7 +14,7 @@ def _get_disk_usage() -> int:
     threshold = timedelta(hours=48)
     now = datetime.utcnow()
     if _cache_time and _cache_time > now - threshold:
-        assert _cache_result
+        assert _cache_result is not None
         return _cache_result
     total_size = 0
     for dir_path, _, file_names in os.walk(config.config['data_dir']):