Fix getting unstructured annotations with typedef using t_placeholder_typedef
Fix getting unstructured annotations with typedef using t_placeholder_typedef

Reviewed By: Alfus

Differential Revision: D35481128

fbshipit-source-id: c4369a6efeb82619c06110979c336c4b2acc04dc

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