Fix: Correct condition for image dilation in orientation estimation

Author: Razlaw

doctr/models/_utils.py

@@ -63,7 +63,7 @@ def estimate_orientation(
         thresh = img.astype(np.uint8)
 
     page_orientation, orientation_confidence = general_page_orientation or (None, 0.0)
-    if page_orientation and orientation_confidence >= min_confidence:
+    if page_orientation is not None and orientation_confidence >= min_confidence:
         # We rotate the image to the general orientation which improves the detection
         # No expand needed bitmap is already padded
         thresh = rotate_image(thresh, -page_orientation)