gdb/

    gdb/
        * varobj.c: Include "vec.h".
        (varobj_p): New typedef, declare vector of those.
        (struct varobj): Use vector for the 'children' member.
        (child_exists): Remove.
        (save_child_in_parent): Remove.
        (remove_child_from_parent): Remove.
        (struct varobj_child): Remove.
        (struct vstack): Remove.
        (vpush, vpop): Remove.
        (varobj_list_children): Adjust to work work vector.
        (varobj_update): Likewise. Use vectors for
        working stack and result.
        (delete_variable_1): Likewise.
        * Makefile.in (varobj.o): Update dependencies.