Support properly loading images with mode I.

nodes.py

@@ -1415,6 +1415,8 @@ class LoadImage:
         output_masks = []
         for i in ImageSequence.Iterator(img):
             i = ImageOps.exif_transpose(i)
+            if i.mode == 'I':
+                i = i.point(lambda i: i * (1 / 255))
             image = i.convert("RGB")
             image = np.array(image).astype(np.float32) / 255.0
             image = torch.from_numpy(image)[None,]