forms/flight: Check that pilot and co-pilot are not the same
forms/flight: Check that pilot and co-pilot are not the same

Turbo87/skylines,shadowoneau/skylines,skylines-project/skylines,kerel-fs/skylines,TobiasLohner/SkyLines,RBE-Avionik/skylines,shadowoneau/skylines,Turbo87/skylines,RBE-Avionik/skylines,TobiasLohner/SkyLines,snip/skylines,shadowoneau/skylines,kerel-fs/skylines,snip/skylines,Harry-R/skylines,Turbo87/skylines,skylines-project/skylines,Harry-R/skylines,kerel-fs/skylines,Harry-R/skylines,Turbo87/skylines,shadowoneau/skylines,TobiasLohner/SkyLines,snip/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,Harry-R/skylines,skylines-project/skylines,skylines-project/skylines