gnrc_netapi: report errors on dispatch
gnrc_netapi: report errors on dispatch

OTAkeys/RIOT,basilfx/RIOT,basilfx/RIOT,kYc0o/RIOT,OlegHahm/RIOT,yogo1212/RIOT,authmillenon/RIOT,kaspar030/RIOT,ant9000/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,miri64/RIOT,ant9000/RIOT,jasonatran/RIOT,kaspar030/RIOT,authmillenon/RIOT,ant9000/RIOT,authmillenon/RIOT,miri64/RIOT,smlng/RIOT,miri64/RIOT,yogo1212/RIOT,basilfx/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,jasonatran/RIOT,authmillenon/RIOT,basilfx/RIOT,kaspar030/RIOT,smlng/RIOT,miri64/RIOT,authmillenon/RIOT,kYc0o/RIOT,kYc0o/RIOT,jasonatran/RIOT,yogo1212/RIOT,OTAkeys/RIOT,yogo1212/RIOT,ant9000/RIOT,OlegHahm/RIOT,kaspar030/RIOT,OTAkeys/RIOT,smlng/RIOT,OlegHahm/RIOT,ant9000/RIOT,basilfx/RIOT,OTAkeys/RIOT,kYc0o/RIOT,OTAkeys/RIOT,miri64/RIOT,jasonatran/RIOT,smlng/RIOT,kaspar030/RIOT,OlegHahm/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,smlng/RIOT,RIOT-OS/RIOT