Fix a crash when enumerating devices on a Dell WLD15
Fix a crash when enumerating devices on a Dell WLD15

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