fix: typo in stats
fix: typo in stats

Summary: This Diff fixes a typo in stats which was also causing failure in rig camera stats computation.

Reviewed By: fabianschenk

Differential Revision: D37717626

fbshipit-source-id: b0a1ef809f4733e8351238ae91bb7bc22b8b1ffc

mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM