#5912: When the last winding leaves the house, we run a cleanup round…

… to release allocated storage (it's likely the last chance to do this since the associated shader might not be used for rendering after this point).

radiantcore/rendersystem/backend/WindingRenderer.h

@@ -448,7 +448,14 @@ class WindingRenderer final :
             _freeSlotMappingHint = slot;
         }
 
-        --_windingCount;
+        if (--_windingCount == 0)
+        {
+            // This was the last winding in the entire renderer, run a cleanup round
+            for (auto& bucket : _buckets)
+            {
+                ensureBucketIsReady(bucket);
+            }
+        }
     }
 
     void updateWinding(Slot slot, const std::vector<MeshVertex>& vertices) override