[firemodel] Make the conversion from degrees to radians for wind direction.
[firemodel] Make the conversion from degrees to radians for wind direction.

This is a temporary fix and should later be done directly when loading wind-ninja's output

fire-rs-laas/fire-rs-saop,fire-rs-laas/fire-rs-saop,fire-rs-laas/fire-rs-saop,fire-rs-laas/fire-rs-saop