Fix warning

Author: ufechner7

test/test_flightpathcalculator.jl

@@ -16,7 +16,7 @@ wcs::WCSettings = WCSettings(dt = 1/set.sample_freq)
 fcs::FPCSettings = FPCSettings(dt=wcs.dt)
 fpps::FPPSettings = FPPSettings()
 u_d0 = 0.01 * set.depower_offset
-u_d  = 0.01 * set.depower
+u_d  = 0.01 * set.depowers[1]
 ssc::SystemStateControl = SystemStateControl(wcs, fcs, fpps; u_d0, u_d, v_wind=set.v_wind)
 dt::Float64 = wcs.dt