a611b70087
The message 'Alert: catching up on tile delete queue' comes from the fact that 48 tiles are scheduled and added to the cache at startup before the plane location is initialized. My proposed patch is to initialize SGLocation with an invalid position and detect this fact before scheduling tiles. I prefer to do that rather than testing for lon and lat being 0,0 because it is a valid position and someone could want to fly near Accra.
[ Nothing here at this time. ]