From Ilka: - fix in TGLViewer dtor to avoid SegV when closing the canvas with active TGLViewerEditor
From Ilka:
- fix in TGLViewer dtor to avoid SegV when closing the canvas with active
TGLViewerEditor


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@14923 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,dawehner/root