Fix typo in GuardedRequestChannel
Fix typo in GuardedRequestChannel

Summary: Simply fixing a typo in `GuardedRequestChannel`

Differential Revision: D38710042

fbshipit-source-id: 9c1ff73e081dfb67eaf2c24045c8ec1c5cdd2c24

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift