Nyall Dawson 4931f8ebe4 Gracefully handle NULL/not-NULL comparisons in QgisTestCase.checkLayersEqual
We always want NULL values sorted first, and never want to try
to directly compare NULL/not NULL values.

Doing so raises an exception on the PyQt6 builds, where NULL === None
and comparisons between None and not-None values are prohibited
in Python
2024-02-12 16:44:06 +10:00
..