Fix shadowed local variable
Fix shadowed local variable

Summary: scary_shadows

Reviewed By: int3

Differential Revision: D17539195

fbshipit-source-id: e9164c59de01043799f2b63a049333b7d88c3767

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