wxPython4 sequels: fix Wx exceptions ignored because no traceback
Some exception triggered on wxPython side have None as traceback,
and exception hanlder was discarding them.
#!/usr/bin/env python# -*- coding: utf-8 -*-# This file is part of Beremiz# Copyright (C) 2019: Edouard TISSERANT## See COPYING file for copyrights details.from __future__ import absolute_importfrom svghmi.svghmi import *