g_assert(neigh_left->end==key->start);
key->start=neigh_left->start;
g_tree_remove(bad_tree,neigh_left);
g_mem_chunk_free(node_memchunk,neigh_left);
}
g_assert(neigh_left->end==key->start);
key->start=neigh_left->start;
g_tree_remove(bad_tree,neigh_left);
g_mem_chunk_free(node_memchunk,neigh_left);
}