diffusers

97c2c6e3 - Fix wrong `do_classifier_free_guidance` threshold in ZImagePipeline (#13183)

Fix wrong `do_classifier_free_guidance` threshold in ZImagePipeline (#13183) Z-Image uses CFG formula `pred = pos + scale * (pos - neg)` where `guidance_scale = 0` means no guidance. The threshold should be `> 0` instead of `> 1` to match this formula. Co-authored-by: Hezlich2 <typretypre@gmail.com>