Fix mismatched tag warning

edolstra · edolstra · commit 9f47eac92bd8 · 2017-08-31T11:04:52.000+02:00
https://hydra.nixos.org/build/59649086
diff --git a/src/libutil/logging.hh b/src/libutil/logging.hh
@@ -40,7 +40,7 @@ typedef uint64_t ActivityId;
 
 class Logger
 {
-    friend class Activity;
+    friend struct Activity;
 
 public:
 
