Minor fix to avoid ZeroGPU pickle error due buffered binary file

xtts.py

@@ -50,7 +50,7 @@ print("Running XTTS Server ...", flush=True)
 @spaces.GPU
 def predict_speaker(wav_file):
     """Compute conditioning inputs from reference audio file."""
-    wav_file = src
+
     if isinstance(wav_file, str):
         wav_file = open(wav_file,"rb");