Fix misplaced const
Fix misplaced const

This causes a warning on some versions of GCC because we're passing in
the inst to be modified, which means it can't be const.  Not sure why
more GCC versions aren't catching this, but it needs to be fixed.

Signed-off-by: Dan Smith <787803eb1755f35291827d0f0268aa9bc7a57464@us.ibm.com>

libvirt/libvirt-cim,libvirt/libvirt-cim,libvirt/libvirt-cim