ENH: Optimized ImageViewRenderer::virtual_UpdateScene() when StackedLayerModel is empty.
ENH: Optimized ImageViewRenderer::virtual_UpdateScene() when StackedLayerModel is empty.

orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB