[PATCH 3 / ?] Fix: Used wrong variable name.

Author: cid-chan

vspreview/cores.py

@@ -14,7 +14,7 @@ def reload_core(self):
         new_environment = self._api.create_environment()
         old_environment = self._current_environment
         self._current_environment = new_environment
-        self._api.destroy_environment(old)
+        self._api.destroy_environment(old_environment)
 
     def on_policy_registered(self, special_api: EnvironmentPolicyAPI):
         self._current_environment = special_api.create_environment()