Retro-compatibility (no manual seed by default)

Author: woctezuma

Diff for: apply_factor.py

@@ -61,7 +61,8 @@
 
     trunc = g.mean_latent(4096)
 
-    torch.manual_seed(torch_seed)
+    if torch_seed > 0:
+        torch.manual_seed(torch_seed)
     latent = torch.randn(args.n_sample, 512, device=args.device)
     latent = g.get_latent(latent)