Fix breaking change in pipeline_stable_diffusion_controlnet.py (#3118)

fix breaking change

Author: remorses

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_controlnet.py

@@ -637,8 +637,8 @@ def prepare_image(
         num_images_per_prompt,
         device,
         dtype,
-        do_classifier_free_guidance,
-        guess_mode,
+        do_classifier_free_guidance=False,
+        guess_mode=False,
     ):
         if not isinstance(image, torch.Tensor):
             if isinstance(image, PIL.Image.Image):