lib/igc: Simplified code by using enumerate() in loop
lib/igc: Simplified code by using enumerate() in loop

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