Update controlnet.py to fix the default controlnet weight as constant (comfyanonymous#4285)

Author: TTPlanetPig

comfy/controlnet.py

@@ -423,7 +423,7 @@ def load_controlnet_hunyuandit(controlnet_data):
 
     latent_format = comfy.latent_formats.SDXL()
     extra_conds = ['text_embedding_mask', 'encoder_hidden_states_t5', 'text_embedding_mask_t5', 'image_meta_size', 'style', 'cos_cis_img', 'sin_cis_img']
-    control = ControlNet(control_model, compression_ratio=1, latent_format=latent_format, load_device=load_device, manual_cast_dtype=manual_cast_dtype, extra_conds=extra_conds, strength_type=StrengthType.LINEAR_UP)
+    control = ControlNet(control_model, compression_ratio=1, latent_format=latent_format, load_device=load_device, manual_cast_dtype=manual_cast_dtype, extra_conds=extra_conds, strength_type=StrengthType.CONSTANT)
     return control
 
 def load_controlnet(ckpt_path, model=None):