fixed sparse rings in lidar

if all datapoints in one ring were missing we would have a shape
mismatch for that data so we have to fill the sparse data out in
the index axis too

tools/render2d.py

@@ -154,6 +154,7 @@ def create_projection_data(
         lidar_data = lidar_data.reindex(
             columns=range(horizontal_resolution), fill_value=0
         )
+        lidar_data = lidar_data.reindex(index=range(vertical_resolution), fill_value=0)
         lidar_data, output_horizontal_resolution = crop_lidar_data_to_roi(
             lidar_data, roi_angle_start, roi_angle_width, horizontal_resolution
         )