Fix minor errors in vscode and gimp about path and postconfig

desktop_env/evaluators/getters/gimp.py

@@ -27,6 +27,11 @@ def get_gimp_config_file(env, config: Dict[str, str]):
 
     _path = os.path.join(env.cache_dir, config["dest"])
     content = env.controller.get_file(config_path)
+
+    if not content:
+        logger.error("Failed to get GIMP config file.")
+        return None
+
     with open(_path, "wb") as f:
         f.write(content)
 

desktop_env/evaluators/metrics/vscode.py

@@ -49,6 +49,8 @@ def check_json_settings(actual: str, expected: str, **options) -> float:
     Return:
         float: the score
     """
+    if not actual:
+        return 0.
 
     with open(actual, 'r') as f:
         data = json.load(f)