[Z-Image] Fix more do_classifier_free_guidance thresholds (#13212)

fix

Author: asomoza

src/diffusers/pipelines/z_image/pipeline_z_image_controlnet.py

@@ -365,7 +365,7 @@ def guidance_scale(self):
 
     @property
     def do_classifier_free_guidance(self):
-        return self._guidance_scale > 1
+        return self._guidance_scale > 0
 
     @property
     def joint_attention_kwargs(self):

src/diffusers/pipelines/z_image/pipeline_z_image_controlnet_inpaint.py

@@ -372,7 +372,7 @@ def guidance_scale(self):
 
     @property
     def do_classifier_free_guidance(self):
-        return self._guidance_scale > 1
+        return self._guidance_scale > 0
 
     @property
     def joint_attention_kwargs(self):

src/diffusers/pipelines/z_image/pipeline_z_image_img2img.py

@@ -347,7 +347,7 @@ def guidance_scale(self):
 
     @property
     def do_classifier_free_guidance(self):
-        return self._guidance_scale > 1
+        return self._guidance_scale > 0
 
     @property
     def joint_attention_kwargs(self):

src/diffusers/pipelines/z_image/pipeline_z_image_inpaint.py

@@ -462,7 +462,7 @@ def guidance_scale(self):
 
     @property
     def do_classifier_free_guidance(self):
-        return self._guidance_scale > 1
+        return self._guidance_scale > 0
 
     @property
     def joint_attention_kwargs(self):

src/diffusers/pipelines/z_image/pipeline_z_image_omni.py

@@ -339,7 +339,7 @@ def guidance_scale(self):
 
     @property
     def do_classifier_free_guidance(self):
-        return self._guidance_scale > 1
+        return self._guidance_scale > 0
 
     @property
     def joint_attention_kwargs(self):