Bind snapshot framebuffer via glstate. refs #373

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@13685 383ad7c9-94d9-4d36-a494-682f7c89f535

OpenFlipper/widgets/glWidget/QtBaseViewer.cc

@@ -1944,7 +1944,7 @@ void glViewer::snapshot(QImage& _image, int _width, int _height, bool _alpha, bo
     
     if ( fb.isValid() ){
 
-      fb.bind();
+      ACG::GLState::bindFramebuffer(GL_FRAMEBUFFER_EXT,fb.handle());
       makeCurrent();
       
       // Turn alpha on if demanded