virsh: Don't leak buffer if GetFDs fails in cmdCreate
virsh: Don't leak buffer if GetFDs fails in cmdCreate

Change the logic of the function to return false by default
and move the freeing of the buffer to the cleanup section.

https://bugzilla.redhat.com/show_bug.cgi?id=1067338

taget/libvirt,fabianfreyer/libvirt,rlaager/libvirt,elmarco/libvirt,agx/libvirt,elmarco/libvirt,jfehlig/libvirt,crobinso/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,eskultety/libvirt,shugaoye/libvirt,zippy2/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,eskultety/libvirt,nertpinx/libvirt,jardasgit/libvirt,eskultety/libvirt,zippy2/libvirt,libvirt/libvirt,jardasgit/libvirt,agx/libvirt,andreabolognani/libvirt,shugaoye/libvirt,crobinso/libvirt,agx/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,nertpinx/libvirt,rlaager/libvirt,datto/libvirt,andreabolognani/libvirt,eskultety/libvirt,zippy2/libvirt,datto/libvirt,olafhering/libvirt,olafhering/libvirt,crobinso/libvirt,datto/libvirt,fabianfreyer/libvirt,libvirt/libvirt,taget/libvirt,datto/libvirt,olafhering/libvirt,elmarco/libvirt,elmarco/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,olafhering/libvirt,agx/libvirt,andreabolognani/libvirt,agx/libvirt,elmarco/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,taget/libvirt,rlaager/libvirt,libvirt/libvirt,rlaager/libvirt,jardasgit/libvirt,taget/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,jardasgit/libvirt,taget/libvirt,shugaoye/libvirt,zippy2/libvirt,datto/libvirt,rlaager/libvirt,nertpinx/libvirt,eskultety/libvirt,jfehlig/libvirt,fabianfreyer/libvirt