Qt5 compat fixes.

PluginCollection-Renderers/Plugin-Render-Classic/Renderer.cc

...tion-Renderers/Plugin-Render-DepthPeeling/DepthPeeling.cc

...n-Renderers/Plugin-Render-DepthPeeling/DepthPeeling_qt.cc

...lection-Renderers/Plugin-Render-Normals/NormalRenderer.cc

...ers/Plugin-Render-Old-DepthPeeling/ClassicDepthPeeling.cc

...lugin-Render-Old-DepthPeeling/ClassicDepthPeeling_glew.cc

...on-Renderers/Plugin-Render-Picking/RenderPickingPlugin.cc

PluginCollection-Renderers/Plugin-Render-SSAO/SSAO.cc

PluginCollection-Renderers/Plugin-Render-SSAO/SSAO_qt.cc

...ection-Renderers/Plugin-Render-ShaderPipeline/Renderer.cc

...inCollection-Renderers/Plugin-Render-Toon/ToonRenderer.cc

...ollection-Renderers/Plugin-Render-Toon/ToonRenderer_qt.cc