util: fix memleak in virFindSCSIHostByPCI
util: fix memleak in virFindSCSIHostByPCI

free buf in cleanup.

Signed-off-by: Zhang Bo <cae72d1e73283b1efb9f7d3401b1ea60af16bc40@huawei.com>

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