Cancel listeners when closing

Signed-off-by: Rahix <rahix@rahix.de>

bc.lua

@@ -224,6 +224,15 @@ function BaseControl:close()
     end
   end
 
+  -- Cancel all listeners
+  for noun, listeners in pairs(self.listeners) do
+    if self.remote_nouns[noun] ~= nil then
+      for id in pairs(listeners) do
+        self:cancel(noun, id)
+      end
+    end
+  end
+
   self.network:stop()
   setmetatable(self, nil)
 end