[libvirt] Issue with GVirDomainDisk setters

[Zeeshan Ali (Khattak)]

Hi Christophe,
   I just found out a small issue in GVirDomainDisk setter functions:
they always add a new attribute on each call rather than overriding
existing value. For example this Vala code:

        disk.set_guest_device_type (DomainDiskGuestDeviceType.DISK);
        disk.set_target_dev ("sdb");
...
        disk.set_guest_device_type (DomainDiskGuestDeviceType.FLOPPY);
        disk.set_target_dev ("fd");

Will generate following XML:

    <disk type="file" device="disk" device="floppy">
      <target dev="sdb" dev="fd"/>
    ...
    </disk>

-- 
Regards,

Zeeshan Ali (Khattak)
FSF member#5124