storage: gluster: Don't leak private data when storage file init fails
storage: gluster: Don't leak private data when storage file init fails

In a44b7b87bcc6681e2939f65a3552fc96f68bc7b6 I've introduced a function
that initializes a storage file wrapper object on gluster based volumes.

The initialization function leaks the private data pointer in case of
failure. This patch fixes it.

Reported by John Ferlan.

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