Fix: siglip image processor rgb_convert is not being applied correctl…

…y. (#34301)

Fix: do_convert_rgb

src/transformers/models/siglip/image_processing_siglip.py

@@ -198,12 +198,12 @@ def preprocess(
             size=size,
             resample=resample,
         )
-        # All transformations expect numpy arrays.
-        images = [to_numpy_array(image) for image in images]
-
         if do_convert_rgb:
             images = [convert_to_rgb(image) for image in images]
 
+        # All transformations expect numpy arrays.
+        images = [to_numpy_array(image) for image in images]
+
         if is_scaled_image(images[0]) and do_rescale:
             logger.warning_once(
                 "It looks like you are trying to rescale already rescaled images. If the input"