update gradio cached examples

tts/gradio_api.py

@@ -38,10 +38,13 @@ def model_worker(input_queue, output_queue, device_id):
         inp_audio_path, inp_npy_path, inp_text, infer_timestep, p_w, t_w = task
 
         if inp_npy_path is None or inp_audio_path is None:
+            output_queue.put(None)
             raise gr.Error("Please provide .wav and .npy file")
         if (inp_audio_path.split('/')[-1][:-4] != inp_npy_path.split('/')[-1][:-4]):
+            output_queue.put(None)
             raise gr.Error(".npy and .wav mismatch")
         if len(inp_text) > 200:
+            output_queue.put(None)
             raise gr.Error("input text is too long")
         
         try:
@@ -66,7 +69,6 @@ def main(inp_audio, inp_npy, inp_text, infer_timestep, p_w, t_w, processes, inpu
     if res is not None:
         return res
     else:
-        print("")
         return None