leaseshelper: fix crash
leaseshelper: fix crash

Commit baafe668 introduced new leaseshelper with a crash of freeing
env string. Calling 'getenv()' inside 'virGetEnvAllowSUID()' may
return a static string and we definitely should not free it.

The author probably want to free the copy of that string.

Signed-off-by: Pavel Hrdina <d4772d05997b8abf035041e3b4f4996380ea7e7a@redhat.com>

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