can't load lcm checkpoint, lcm lora works well

when trying to load lcm sdxl checkpoint, throw this error
```
Error occurred when executing CheckpointLoaderSimple:

'model.diffusion_model.input_blocks.0.0.weight'

File "F:\Comfy\ComfyUI\execution.py", line 153, in recursive_execute
output_data, output_ui = get_output_data(obj, input_data_all)
File "F:\Comfy\ComfyUI\execution.py", line 83, in get_output_data
return_values = map_node_over_list(obj, input_data_all, obj.FUNCTION, allow_interrupt=True)
File "F:\Comfy\ComfyUI\execution.py", line 76, in map_node_over_list
results.append(getattr(obj, func)(**slice_dict(input_data_all, i)))
File "F:\Comfy\ComfyUI\nodes.py", line 476, in load_checkpoint
out = comfy.sd.load_checkpoint_guess_config(ckpt_path, output_vae=True, output_clip=True, embedding_directory=folder_paths.get_folder_paths("embeddings"))
File "F:\Comfy\ComfyUI\comfy\sd.py", line 431, in load_checkpoint_guess_config
model_config = model_detection.model_config_from_unet(sd, "model.diffusion_model.", unet_dtype)
File "F:\Comfy\ComfyUI\comfy\model_detection.py", line 141, in model_config_from_unet
unet_config = detect_unet_config(state_dict, unet_key_prefix, dtype)
File "F:\Comfy\ComfyUI\comfy\model_detection.py", line 49, in detect_unet_config
model_channels = state_dict['{}input_blocks.0.0.weight'.format(key_prefix)].shape[0]
```