Fix lint error

Author: Lunderberg

python/tvm/tir/schedule/trace.py

@@ -285,6 +285,6 @@ def show(self, style: Optional[str] = None, black_format: bool = False) -> None:
 
         if black_format is None:
             env = os.environ.get("TVM_BLACK_FORMAT")
-            black_format = env and int(env)
+            black_format = bool(env and int(env))
 
         cprint(str(self), style=style, black_format=black_format)