throw error for resampling int waveform

torchaudio/functional/functional.py

@@ -1399,6 +1399,11 @@ def _apply_sinc_resample_kernel(
     kernel: Tensor,
     width: int,
 ):
+    if not waveform.is_floating_point():
+        raise TypeError(
+            f"Expected floating point type for waveform tensor, but received {waveform.dtype}."
+        )
+
     orig_freq = int(orig_freq) // gcd
     new_freq = int(new_freq) // gcd