#33 Absent colorbar ticks with OpenGL

[Petr Aleksandrov]

Colorbar ticks are not displayed when OpenGL is used. For testing I have used a modified mgl_glut_example with argument "2" (I have uncommented the line 222 (gr->Colorbar();) in wnd_samples.cpp). In Qt example the ticks are displayed.
System: Ubuntu 15.04 amd64, notebook MSI S12 Kabini E1 with fglrx drivers.