leaseshelper: reduce indentation level in virLeaseReadCustomLeaseFile
leaseshelper: reduce indentation level in virLeaseReadCustomLeaseFile

Instead of nested ifs, jump out early.

Mostly whitespace changes.

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