Assign auto to empty memory mode in GCOV runconfig (#1003)

* assign auto to empty memory mode in GCOV runconfig

* Update python/packages/nisar/workflows/gcov_runconfig.py

Co-authored-by: Geoffrey M Gunter <[email protected]>

Co-authored-by: Geoffrey M Gunter <[email protected]>

Author: 2 people

python/packages/nisar/workflows/gcov_runconfig.py

@@ -40,7 +40,7 @@ def load(self):
             geocode_dict['memory_mode'] = isce3.geocode.GeocodeMemoryMode.BLOCKS_GEOGRID
         elif geocode_dict['memory_mode'] == 'geogrid_and_radargrid':
             geocode_dict['memory_mode'] = isce3.geocode.GeocodeMemoryMode.BLOCKS_GEOGRID_AND_RADARGRID
-        elif geocode_dict['memory_mode'] == 'auto':
+        elif geocode_dict['memory_mode'] == 'auto' or (geocode_dict['memory_mode'] is None):
             geocode_dict['memory_mode'] = isce3.geocode.GeocodeMemoryMode.AUTO
         else:
             err_msg = f"ERROR memory_mode: {geocode_dict['memory_mode']}"