Fix caller_too_large always returning false
Fix caller_too_large always returning false

Summary:
Oops. I screwed this function up in D7434323.
Luckily we caught it before it went to staging or stable

Reviewed By: thezhangwei

Differential Revision: D7526583

fbshipit-source-id: fc7d1f800edcfb721f87948bff9ad263363cfc93

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex