"Unassigned polygons have been selected" not selecting anything: I have the code fix!

[opusGlass]

Issue Overview

The error code "Some polygons of <...> not assigned to any body part. The unassigned polygons have been selected in the mesh so they can easily be identified." frequently appears, but never selects any polygons.

Version Information

Blender Nif Plugin Version Info

2.6.0dev4

Blender Version Info

2.78

Platform information

Windows 10

Expected Result

Polygons that are not assigned to a body part should be selected automatically so the user can correct them.

Actual Result

No polygons are selected after receiving this error message.

Possible Fix

Line 1048 of "objectsys/object_export.py" needs to be moved down below line 1052.

Before (starting at line 1046):

                # select bad polygons
                # switch to edit mode to select polygons
                bpy.ops.object.mode_set(mode='EDIT',toggle=False)
                for face in b_mesh.polygons:
                    face.select = False
                for face in polygons_without_bodypart:
                    face.select = True

After:

                # select bad polygons
                for face in b_mesh.polygons:
                    face.select = False
                for face in polygons_without_bodypart:
                    face.select = True
                # switch to edit mode to select polygons
                bpy.ops.object.mode_set(mode='EDIT',toggle=False)

Console Output

[opusGlass]

A blend file to use for testing:
blooddraugr_08_testing.zip

It's ready for export, other than some unassigned polygons. Try exporting it to nif (choose Skyrim, enable Flatten Skin, and set Max Partition Bones to 60). Then, it will show the error and automatically switch to edit mode. But, no faces will be selected. If you make my fix to object_export.py it will then select the problematic polygons after export.