Apply fix from #1649 to main

Author: rwightman

timm/models/maxxvit.py

@@ -36,7 +36,7 @@
 
 import math
 from collections import OrderedDict
-from dataclasses import dataclass, replace
+from dataclasses import dataclass, replace, field
 from functools import partial
 from typing import Callable, Optional, Union, Tuple, List
 
@@ -133,8 +133,8 @@ class MaxxVitCfg:
     block_type: Tuple[Union[str, Tuple[str, ...]], ...] = ('C', 'C', 'T', 'T')
     stem_width: Union[int, Tuple[int, int]] = 64
     stem_bias: bool = False
-    conv_cfg: MaxxVitConvCfg = MaxxVitConvCfg()
-    transformer_cfg: MaxxVitTransformerCfg = MaxxVitTransformerCfg()
+    conv_cfg: MaxxVitConvCfg = field(default_factory=MaxxVitConvCfg)
+    transformer_cfg: MaxxVitTransformerCfg = field(default_factory=MaxxVitTransformerCfg)
     head_hidden_size: int = None
     weight_init: str = 'vit_eff'
 
@@ -2279,4 +2279,4 @@ def maxvit_xlarge_tf_384(pretrained=False, **kwargs):
 
 @register_model
 def maxvit_xlarge_tf_512(pretrained=False, **kwargs):
-    return _create_maxxvit('maxvit_xlarge_tf_512', 'maxvit_xlarge_tf', pretrained=pretrained, **kwargs)
+    return _create_maxxvit('maxvit_xlarge_tf_512', 'maxvit_xlarge_tf', pretrained=pretrained, **kwargs)