xpath BUGFIX moveto_node segfault
xpath BUGFIX moveto_node segfault

If the context node gets removed,
the whole set is emptied, which
was not expected.

lukasmacko/libyang,PavolVican/libyang,PavolVican/libyang,PavolVican/libyang,lukasmacko/libyang,PavolVican/libyang,PavolVican/libyang