i3-companion: ensure variables are captured when wrapping event

bin/i3-companion

@@ -456,6 +456,7 @@ async def main(options):
             if isinstance(event, DBusSignal):
                 for bus in {i3.session_bus, i3.system_bus}:
 
+                    def wrapping(fn, event):
                         @ravel.signal(
                             name=event.member,
                             in_signature=event.signature,
@@ -464,13 +465,14 @@ async def main(options):
                         )
                         async def wrapped(path, args):
                             return await fn(i3, event, path, *args)
+                        return wrapped
 
                     bus.listen_signal(
                         path=event.path,
                         fallback=True,
                         interface=event.interface,
                         name=event.member,
-                        func=wrapped,
+                        func=wrapping(fn, event),
                     )
 
     await i3.main()