Fix visualization images not being in float32, fix steps showing up a…

…s None when using S. Cus. node

animatediff/context.py

@@ -616,6 +616,8 @@ def generate_context_visualization(context_opts: ContextOptionsGroup, model: Mod
 
     if start_step is None:
         start_step = 0  # use this in case start_step is provided, to display accurate step
+    if steps is None:
+        steps = len(sigmas)
 
     for i, t in enumerate(sigmas):
         # make context_opts reflect current step/sigma
@@ -674,5 +676,5 @@ def generate_context_visualization(context_opts: ContextOptionsGroup, model: Mod
                 repeat_count += 1
 
     images = torch.stack(all_imgs)
-    images = images.movedim(1, -1)
+    images = images.movedim(1, -1).to(torch.float32)
     return images