trivial: Fix tiny memory leak when using FuSrecFirmware
trivial: Fix tiny memory leak when using FuSrecFirmware

hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd