OSM importer crashes with --enable-3D (UnboundLocalError: newCoordy)

[aalgirdas]

Describe the Bug

When running the Webots OSM importer with --enable-3D, the importer consistently crashes for me. Without --enable-3D, the same OSM input generates a .wbt correctly.

Steps to Reproduce

1. Run the importer without 3D (works):

   python resources/osm_importer/importer.py --no-trees --no-forests --input="test.osm" --output="test.wbt"

[aalgirdas]

Additional information (crash details with --enable-3D)

When running the importer with 3D enabled:

python importer.py --enable-3D --input="{osm_path}" --output={wbt_file_path}

the process successfully acquires elevation data and creates the ElevationGrid in the resulting .wbt file. However, no objects (roads, buildings, rivers, etc.) are added, and the importer then crashes with the following exception:

Acquiring elevation data, please be patient
* Elevation data acquired
Traceback (most recent call last):
  File "/content/webots/resources/osm_importer/importer.py", line 158, in <module>
    parser.parse_file(options.inFile, options.disableMultipolygonBuildings)
  File "/content/webots/resources/osm_importer/parser_objects.py", line 53, in parse_file
    self.parse_way(way)
  File "/content/webots/resources/osm_importer/parser_objects.py", line 113, in parse_way
    River.add_to_list(osmId, tags, refs)
  File "/content/webots/resources/osm_importer/webots_objects/river.py", line 56, in add_to_list
    river.ref = River.add_intermediate_point_where_needed(river.ref)
  ...
  File "/content/webots/resources/osm_importer/webots_objects/webots_object.py", line 95, in add_intermediate_point_where_needed
    newOSMID = OSMCoord.add_new_coord_to_list(newCoordX, newCoordy)
UnboundLocalError: local variable 'newCoordy' referenced before assignment

[CoolSpy3]

Looks like the root cause was a typo in the script. I just merged a PR to fix it, so hopefully, this should work in the next nightly build.