nwfilter: Fix sscanf off-by-one error in virNWFilterSnoopLeaseFileLoad
nwfilter: Fix sscanf off-by-one error in virNWFilterSnoopLeaseFileLoad

We allocate 16 bytes for IPv4 address and 55 bytes for interface
key, therefore we should read up to 15/54 bytes and let the last byte
reserved for terminating null byte in sscanf.

https://bugzilla.redhat.com/show_bug.cgi?id=1226400

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