mark glStereo option as temporary disabled, if the opengl context does

not support it.

widgets/coreWidget/CoreWidget.cc

@@ -223,7 +223,7 @@ CoreWidget( QVector<ViewMode*>& _viewModes,
   glScene_ = new QtGLGraphicsScene (&examiner_widgets_, baseLayout_);
 
   // is stereo possible, use it?
-  OpenFlipper::Options::glStereo(glWidget_->format().stereo());
+  OpenFlipper::Options::glStereo(glWidget_->format().stereo(), true);
 
   glView_->setViewport(glWidget_);
   glView_->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);