Hello.
When you open this change set in JOSM
you see 4 rectangular building in the centre.  In between those and below the lowest rectangular building, you can spot 3 equally nice round objects. On the ESRI imagery they are not that clear, But when you take a look on the Bing imagery they are very clear to identify, (I added a few ones)
In these area (old) round huts are still in use as homes or as storage. 
Check this as well.
https://en.wikipedia.org › wiki › African_round_hut
Best regads