thunderboy's_stallhorns

Two more stallbhorns, a medium and a fast one. Makes the stall more "urgent". Replaces the High Pitch stock Beeeeeeeeeeeeeeeep with a lower pitch Beeeeeep, Beeeeeep, or (Fast) Beeep Beeep. In stock airplanes, you may need to turn "on" the stallhorn sound to hear it. By 887Thunderboy...