Fix Gtk-CRITICAL **: IA__gtk_widget_set_size_request: assertion 'width >= -1' failed
Issue #74
new
They happen in different cases at runtime. For example,
$ python PLCOpenEditor.py (PLCOpenEditor.py:22314): Gtk-CRITICAL : IA__gtk_widget_set_size_request: assertion 'width >= -1' failed (PLCOpenEditor.py:22314): Gtk-CRITICAL : IA__gtk_widget_set_size_request: assertion 'width >= -1' failed