use torch for AngleProtoLoss

TTS/speaker_encoder/losses.py

@@ -155,6 +155,6 @@ class AngleProtoLoss(nn.Module):
         cos_sim_matrix = F.cosine_similarity(out_positive.unsqueeze(-1).expand(-1, -1, num_speakers), out_anchor.unsqueeze(-1).expand(-1, -1, num_speakers).transpose(0, 2))
         torch.clamp(self.w, 1e-6)
         cos_sim_matrix = cos_sim_matrix * self.w + self.b
-        label = torch.from_numpy(np.asarray(range(0, num_speakers))).to(cos_sim_matrix.device)
+        label = torch.arange(num_speakers).to(cos_sim_matrix.device)
         L = self.criterion(cos_sim_matrix, label)
         return L