Revert changeset #88c8c874f4b8. #88c8c874f4b8 try to fix crashing, but it blame to wrong code. If you look into runtime stack of xnjsmb_coord_remove(), you will find self argument is already wrong. It is in an invalid address.

# -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
# vim: sw=4:ts=8:sts=4
m4datadir = $(datadir)/mb
dist_m4data_DATA = foreach.m4 mb_c_header.m4 mb_c_source.m4
dist_bin_SCRIPTS = svg2code.py