ArViz: Set point cloud size directly (needed for point clouds with shrinking size)

source/RobotAPI/components/ArViz/Coin/VisualizationPointCloud.h

@@ -55,6 +55,7 @@ namespace armarx::viz::coin
             pclMat->transparency = element.transparency;
 
             pclCoords->point.setValues(0, coords.size(), coords.data());
+            pclCoords->point.setNum(coords.size());
 
             pclStye->pointSize = element.pointSizeInPixels;