fix for asset_directory

modules/config.py

@@ -180,7 +180,7 @@ class Config:
         self.general = {
             "cache": check_for_attribute(self.data, "cache", parent="settings", var_type="bool", default=True),
             "cache_expiration": check_for_attribute(self.data, "cache_expiration", parent="settings", var_type="int", default=60),
-            "asset_directory": check_for_attribute(self.data, "asset_directory", parent="settings", var_type="list_path", default=[os.path.join(default_dir, "assets")]),
+            "asset_directory": check_for_attribute(self.data, "asset_directory", parent="settings", var_type="list_path", default=[os.path.join(default_dir, "assets")], default_is_none=True),
             "asset_folders": check_for_attribute(self.data, "asset_folders", parent="settings", var_type="bool", default=True),
             "assets_for_all": check_for_attribute(self.data, "assets_for_all", parent="settings", var_type="bool", default=False, save=False, do_print=False),
             "sync_mode": check_for_attribute(self.data, "sync_mode", parent="settings", default="append", test_list=sync_modes),