Crash when exporting tasks with export plugin

[Bryce Harrington]

Steps to reproduce...
1. Enable export plugin
2. Plugins -> Export
3. Click open
-> crash

Traceback (most recent call last):
  File "/home/bryce/src/gtg/gtg-756/GTG/plugins/export/export.py", line 322, in on_export_open
    if not self.export_execute_with_ui():
  File "/home/bryce/src/gtg/gtg-756/GTG/plugins/export/export.py", line 305, in export_execute_with_ui
    if not step[0]():
  File "/home/bryce/src/gtg/gtg-756/GTG/plugins/export/export.py", line 265, in export_generate
    model = self.plugin_api.get_ctask_modelsort()
AttributeError: PluginAPI instance has no attribute 'get_ctask_modelsort'

[Bryce Harrington (bryce)]

This probably relates to bug #529520 but hopefully is more specific.

[Luca Invernizzi (invernizzi)]

fixed in the liblarch_newbase branch. Marked as "in progress" as it's not in trunk yet.