Update image_processing_deformable_detr.py (#28561)

* Update image_processing_deformable_detr.py

* Changes after running make fix-copies

src/transformers/models/conditional_detr/image_processing_conditional_detr.py

@@ -1414,6 +1414,7 @@ class ConditionalDetrImageProcessor(BaseImageProcessor):
         boxes = torch.gather(boxes, 1, topk_boxes.unsqueeze(-1).repeat(1, 1, 4))
 
         # and from relative [0, 1] to absolute [0, height] coordinates
+        if target_sizes is not None:
             if isinstance(target_sizes, List):
                 img_h = torch.Tensor([i[0] for i in target_sizes])
                 img_w = torch.Tensor([i[1] for i in target_sizes])

src/transformers/models/deformable_detr/image_processing_deformable_detr.py

@@ -1411,6 +1411,7 @@ class DeformableDetrImageProcessor(BaseImageProcessor):
         boxes = torch.gather(boxes, 1, topk_boxes.unsqueeze(-1).repeat(1, 1, 4))
 
         # and from relative [0, 1] to absolute [0, height] coordinates
+        if target_sizes is not None:
             if isinstance(target_sizes, List):
                 img_h = torch.Tensor([i[0] for i in target_sizes])
                 img_w = torch.Tensor([i[1] for i in target_sizes])