fix post-processing (#2968)

Co-authored-by: yiyixuxu <yixu310@gmail,com>

src/diffusers/pipelines/alt_diffusion/pipeline_alt_diffusion_img2img.py

@@ -734,6 +734,7 @@ class AltDiffusionImg2ImgPipeline(DiffusionPipeline, TextualInversionLoaderMixin
             image = latents
             has_nsfw_concept = None
 
+        else:
             image = self.decode_latents(latents)
 
             if self.safety_checker is not None:

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_img2img.py

@@ -742,6 +742,7 @@ class StableDiffusionImg2ImgPipeline(DiffusionPipeline, TextualInversionLoaderMi
             image = latents
             has_nsfw_concept = None
 
+        else:
             image = self.decode_latents(latents)
 
             if self.safety_checker is not None: