Fix yaw out of bounds in `mouseEventToCoords`.
Fix yaw out of bounds in `mouseEventToCoords`.

If `config.yaw` is close to -180 or 180, `yaw` might be out of bounds.

psteph801/psteph801.github.io,psteph801/psteph801.github.io,mpetroff/pannellum,psteph801/psteph801.github.io,mpetroff/pannellum,mpetroff/pannellum,psteph801/psteph801.github.io,mpetroff/pannellum