human
Solve the following python programming problem given the following code:
@ defer.inlineCallbacks 
def wait_for_sync_for_user(self, sync_config, since_token = None, timeout = 0, full_state = False) : 
    'Get the sync for a client if we have new data for it now. Otherwise
        wait for new data to arrive on the server. If the timeout expires, then
        return an empty sync result.
        Returns:
            A Deferred SyncResult.
        ' 
    context = LoggingContext.current_context () 
    if context : 
        if (since_token is None) : 
            context.tag = 'initial_sync' 
else : 
            if full_state : 
                context.tag = 'full_state_sync' 
else : 
                context.tag = 'incremental_sync' 
if ((result == 0) or (since_token is None) or full_state) : 
        result = (yield self.current_sync_for_user (sync_config, since_token, full_state = full_state)) 
        defer.returnValue (result) 
else : 
        def current_sync_callback(before_token, after_token) : 
            return self.current_sync_for_user (sync_config, since_token) 
result = (yield self.notifier.wait_for_events (sync_config.user.to_string (), timeout, current_sync_callback, from_token = since_token)) 
        defer.returnValue (result) 

    
    

    Fix the buggy line: if ((result == 0) or (since_token is None) or full_state) :
assistant
#Here is Python program to fix the buggy line: if ((result == 0) or (since_token is None) or full_state) :
.

if ((timeout == 0) or (since_token is None) or full_state) :