Minor typo fix
Minor typo fix

Summary:
Typo in checkers.ml
Closes https://github.com/facebook/infer/pull/424

Reviewed By: martinoluca

Differential Revision: D3669416

Pulled By: jvillard

fbshipit-source-id: 1ef0fed

blzq/infer,jsachs/infer,kageiit/infer,xennygrimmato/infer,jvillard/infer,jsachs/infer,facebook/infer,blzq/infer,xennygrimmato/infer,jsachs/infer,xennygrimmato/infer,facebook/infer,blzq/infer,ropas/infer,ryoon/infer,kageiit/infer,facebook/infer,ropas/infer,ropas/infer,jvillard/infer,jsachs/infer,kageiit/infer,jvillard/infer,ryoon/infer,kageiit/infer,jsachs/infer,ropas/infer,ryoon/infer,jvillard/infer,kageiit/infer,ryoon/infer,jvillard/infer,facebook/infer,xennygrimmato/infer,blzq/infer,facebook/infer,kageiit/infer,xennygrimmato/infer,xennygrimmato/infer,blzq/infer,facebook/infer,kageiit/infer,xennygrimmato/infer,jsachs/infer,ropas/infer,blzq/infer,ryoon/infer,ryoon/infer,jvillard/infer,facebook/infer,ropas/infer,jvillard/infer