Mark mutex as mutable in BanList to fix building issues

diff --git a/source/BanList.H b/source/BanList.H
index 0bdb878..c28504c 100644 (file)
--- a/source/BanList.H
+++ b/source/BanList.H
@@ -40,7 +40,7 @@ public:
 
 private:
   List storage;
-  BotMutex ban_mutex;
+  mutable BotMutex ban_mutex;
 
   iterator find (const Mask&);