Fix golf WaitReadyHole barrier cleanup guard

exitWaitReadyHole guarded its cleanup with hasattr(self, '__barrier'), but the attribute is name-mangled to _DistributedGolfCourseAI__barrier, so the check is always False and the cleanup never runs. The WaitReadyHole barrier leaks every time the FSM leaves that state.

self.__barrier is initialized to None in __init__, so guard on the value instead, matching exitWaitJoin and the handleExitedAvatar path.

toontown/golf/DistributedGolfCourseAI.py

@@ -326,7 +326,7 @@ class DistributedGolfCourseAI(DistributedObjectAI.DistributedObjectAI, FSM):
 
     def exitWaitReadyHole(self):
         self.notify.debugStateCall(self)
-        if hasattr(self, '__barrier'):
+        if self.__barrier:
             self.__barrier.cleanup()
             self.__barrier = None
         return