Fix regular chroma radiance (Comfy-Org#11276)

Author: comfyanonymous

comfy/model_detection.py

@@ -261,6 +261,8 @@ def detect_unet_config(state_dict, key_prefix, metadata=None):
                 dit_config["nerf_embedder_dtype"] = torch.float32
             if "__x0__" in state_dict_keys: # x0 pred
                 dit_config["use_x0"] = True
+            else:
+                dit_config["use_x0"] = False
         else:
             dit_config["guidance_embed"] = "{}guidance_in.in_layer.weight".format(key_prefix) in state_dict_keys
             dit_config["yak_mlp"] = '{}double_blocks.0.img_mlp.gate_proj.weight'.format(key_prefix) in state_dict_keys