controllers.upload: move adding of igc_file down
controllers.upload: move adding of igc_file down

Fixes a problem when the previous checks fail that even then the flight
somehow would be added to the flight table without calling DBSession.add(flight)

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