dell: Don't return the address of a stack variable
dell: Don't return the address of a stack variable

Found using Coverity.

superm1/fwupd,hughsie/fwupd,vathpela/fwupd,fwupd/fwupd,fwupd/fwupd,vathpela/fwupd,hughsie/fwupd,hughsie/fwupd,hughsie/fwupd,vathpela/fwupd,vathpela/fwupd,superm1/fwupd,superm1/fwupd,fwupd/fwupd,fwupd/fwupd