[WL21389] Minor fix to RenderableShapeEntityItem::doRender (details below).

Shape isn't guaranteed to be permanent and thus the triangle count isn't
guaranteed to be the same since inception, so grab it each time.

Changes to be committed:
    modified:   libraries/entities-renderer/src/RenderableShapeEntityItem.cpp

libraries/entities-renderer/src/RenderableShapeEntityItem.cpp

@@ -154,6 +154,6 @@ void ShapeEntityRenderer::doRender(RenderArgs* args) {
         }
     }
 
-    static const auto triCount = geometryCache->getShapeTriangleCount(geometryShape);
+    const auto triCount = geometryCache->getShapeTriangleCount(geometryShape);
     args->_details._trianglesRendered += (int)triCount;
 }