uploader: improved error message to show expected code
uploader: improved error message to show expected code

jschall/SiK,tridge/SiK,LorenzMeier/SiK,mikeclement/SiK,mikeclement/SiK,Dronecode/SiK,Serveurperso/SiK,tridge/DavisSi1000,nusepo/SiK,joeman155/SiK,tridge/DavisSi1000,mikeclement/SiK,phelpsw/SiK,chrissnell/DavisSi1000,gardners/SiK,tomszilagyi/SiK,weera00/SiK,RFDesign/SiK,Dronecode/SiK,mikeclement/SiK,tridge/SiK,Dronecode/SiK,RFDesign/SiK,tomszilagyi/SiK,gardners/SiK,mikeclement/SiK,joeman155/SiK,joeman155/SiK,GaloisInc/smaccmpilot-SiK,davidbuzz/SiK,weera00/SiK,gardners/SiK,davidbuzz/SiK,geeksville/SiK,jschall/SiK,gardners/SiK,geeksville/SiK,phelpsw/SiK,RFDesign/SiK,chrissnell/DavisSi1000,chrissnell/DavisSi1000,tomszilagyi/SiK,weera00/SiK,LorenzMeier/SiK,Serveurperso/SiK,tomszilagyi/SiK,geeksville/SiK,tridge/DavisSi1000,phelpsw/SiK,Serveurperso/SiK,tridge/SiK,geeksville/SiK,tridge/SiK,davidbuzz/SiK,RFDesign/SiK,jschall/SiK,GaloisInc/smaccmpilot-SiK,tridge/SiK,LorenzMeier/SiK,chrissnell/DavisSi1000,weera00/SiK,GaloisInc/smaccmpilot-SiK,geeksville/SiK,jschall/SiK,RFDesign/SiK,GaloisInc/smaccmpilot-SiK,phelpsw/SiK,chrissnell/DavisSi1000,tridge/DavisSi1000,Dronecode/SiK,davidbuzz/SiK,weera00/SiK,tomszilagyi/SiK,nusepo/SiK,nusepo/SiK,nusepo/SiK,joeman155/SiK,Serveurperso/SiK,joeman155/SiK,nusepo/SiK,davidbuzz/SiK,phelpsw/SiK,LorenzMeier/SiK