[bugfix][Cli Inference] Resolve runtime errors when running fastvideo generate (#495)

fastvideo/v1/fastvideo_args.py

@@ -387,9 +387,8 @@ class FastVideoArgs:
             # Use getattr with default value from the dataclass for potentially missing attributes
             else:
                 default_value = getattr(cls, attr, None)
-                attr = getattr(args, attr, default_value)  # type: ignore
-                if attr is not None:
-                    kwargs[attr] = attr
+                if getattr(args, attr, default_value) is not None:
+                    kwargs[attr] = getattr(args, attr, default_value)
 
         return cls(**kwargs)