fix differing behaviour in return type of custom upload handler
fix differing behaviour in return type of custom upload handler

electrolinux/bolt,lenvanessen/bolt,nikgo/bolt,CarsonF/bolt,bolt/bolt,Intendit/bolt,rarila/bolt,HonzaMikula/masivnipostele,cdowdy/bolt,electrolinux/bolt,lenvanessen/bolt,nikgo/bolt,Intendit/bolt,bolt/bolt,romulo1984/bolt,romulo1984/bolt,bolt/bolt,cdowdy/bolt,cdowdy/bolt,lenvanessen/bolt,Intendit/bolt,nikgo/bolt,cdowdy/bolt,lenvanessen/bolt,joshuan/bolt,bolt/bolt,GawainLynch/bolt,rarila/bolt,nikgo/bolt,CarsonF/bolt,romulo1984/bolt,Raistlfiren/bolt,Intendit/bolt,CarsonF/bolt,GawainLynch/bolt,electrolinux/bolt,rarila/bolt,joshuan/bolt,GawainLynch/bolt,CarsonF/bolt,electrolinux/bolt,romulo1984/bolt,HonzaMikula/masivnipostele,rarila/bolt,GawainLynch/bolt,HonzaMikula/masivnipostele,Raistlfiren/bolt,joshuan/bolt,Raistlfiren/bolt,joshuan/bolt,Raistlfiren/bolt,HonzaMikula/masivnipostele