Fix to avoid error with synced_gpus

custom_generate/generate.py

@@ -26,7 +26,7 @@ def _constrained_beam_search(
         logits_processor: LogitsProcessorList,
         stopping_criteria: StoppingCriteriaList,
         generation_config: GenerationConfig,
-        synced_gpus: bool,
+        synced_gpus: bool = False,
         streamer: Optional["BaseStreamer"] = None,
         **model_kwargs,
     ) -> Union[GenerateBeamOutput, torch.LongTensor]: