fix bnb loader

Signed-off-by: Vladimir Mandic <mandic00@live.com>

modules/model_quant.py

@@ -11,7 +11,7 @@ def create_bnb_config(kwargs):
     from modules import shared, devices
     if len(shared.opts.bnb_quantization) > 0:
         if 'Model' in shared.opts.bnb_quantization and 'transformer' not in kwargs:
-            load_bnb('Load model')
+            load_bnb()
             bnb_config = diffusers.BitsAndBytesConfig(
                 load_in_8bit=shared.opts.bnb_quantization_type in ['fp8'],
                 load_in_4bit=shared.opts.bnb_quantization_type in ['nf4', 'fp4'],
@@ -34,6 +34,8 @@ def load_bnb(msg='', silent=False):
     try:
         import bitsandbytes
         bnb = bitsandbytes
+        diffusers.utils.import_utils._bitsandbytes_available = True # pylint: disable=protected-access
+        diffusers.utils.import_utils._bitsandbytes_version = '0.43.3' # pylint: disable=protected-access
         return bnb
     except Exception as e:
         if len(msg) > 0: