Fix VAEEncodeForInpaint to support WAN VAE tuple downscale_ratio (Comfy-Org#11572)

Use vae.spacial_compression_encode() instead of directly accessing
downscale_ratio to handle both standard VAEs (int) and WAN VAEs (tuple).

Addresses reviewer feedback on PR Comfy-Org#11259.

Co-authored-by: ChrisFab16 <christopher@fabritius.dk>

Author: rattus128

nodes.py

@@ -378,14 +378,15 @@ def INPUT_TYPES(s):
     CATEGORY = "latent/inpaint"
 
     def encode(self, vae, pixels, mask, grow_mask_by=6):
-        x = (pixels.shape[1] // vae.downscale_ratio) * vae.downscale_ratio
-        y = (pixels.shape[2] // vae.downscale_ratio) * vae.downscale_ratio
+        downscale_ratio = vae.spacial_compression_encode()
+        x = (pixels.shape[1] // downscale_ratio) * downscale_ratio
+        y = (pixels.shape[2] // downscale_ratio) * downscale_ratio
         mask = torch.nn.functional.interpolate(mask.reshape((-1, 1, mask.shape[-2], mask.shape[-1])), size=(pixels.shape[1], pixels.shape[2]), mode="bilinear")
 
         pixels = pixels.clone()
         if pixels.shape[1] != x or pixels.shape[2] != y:
-            x_offset = (pixels.shape[1] % vae.downscale_ratio) // 2
-            y_offset = (pixels.shape[2] % vae.downscale_ratio) // 2
+            x_offset = (pixels.shape[1] % downscale_ratio) // 2
+            y_offset = (pixels.shape[2] % downscale_ratio) // 2
             pixels = pixels[:,x_offset:x + x_offset, y_offset:y + y_offset,:]
             mask = mask[:,:,x_offset:x + x_offset, y_offset:y + y_offset]