We have to explicitly free smb_fname, because after openat_pathref_fsp
we have a file descriptor around. If we then later talloc_free() the
connection_struct, fd_handle_destructor() panics because talloc_free()
does not free smb_fname before the connection_struct.
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Anoop C S <anoopcs@samba.org>