Fix bug in last commit.
Fix bug in last commit.

ywjrg/pannellum,psteph801/psteph801.github.io,riuson/pannellum,eric-seekas/pannellum,ywjrg/pannellum,mpetroff/pannellum,riuson/pannellum,psteph801/psteph801.github.io,riuson/pannellum,quentinyang/pannellum,ywjrg/pannellum,Benvii/pannellum,quentinyang/pannellum,quentinyang/pannellum,eric-seekas/pannellum,ywjrg/pannellum,eric-seekas/pannellum,Benvii/pannellum,mpetroff/pannellum,Benvii/pannellum,eric-seekas/pannellum,mpetroff/pannellum,psteph801/psteph801.github.io,quentinyang/pannellum,psteph801/psteph801.github.io,mpetroff/pannellum,Benvii/pannellum,riuson/pannellum