Merge pull request #15102 from light-and-ray/fix_jpeg_live_preview

fix_jpeg_live_preview

modules/shared_state.py

@@ -162,5 +162,7 @@ class State:
             errors.record_exception()
 
     def assign_current_image(self, image):
+        if shared.opts.live_previews_image_format == 'jpeg' and image.mode == 'RGBA':
+            image = image.convert('RGB')
         self.current_image = image
         self.id_live_preview += 1