From 743259874fd27c4fc868e8175a7d81f4fd0c675b Mon Sep 17 00:00:00 2001
From: Andrew Thornton <art27@cantab.net>
Date: Sat, 7 Dec 2019 20:59:21 +0000
Subject: [PATCH] Log: Ensure FLAGS=none is -1

---
 modules/log/flags.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/log/flags.go b/modules/log/flags.go
index 992fc62ddb6e8..95950548ece7e 100644
--- a/modules/log/flags.go
+++ b/modules/log/flags.go
@@ -60,5 +60,8 @@ func FlagsFromString(from string) int {
 			flags |= f
 		}
 	}
+	if flags == 0 {
+		return -1
+	}
 	return flags
 }