message: highgui: fixed build GTK2+OpenGL
diff: @@ -64,7 +64,7 @@ if(WITH_GTK AND NOT HAVE_QT)
  if(WITH_OPENGL AND NOT HAVE_GTK3)
  ocv_check_modules(GTKGLEXT gtkglext-1.0)
  if(HAVE_GTKGLEXT)
  - ocv_append_build_options(GTKGLEXT GTHREAD)
  + ocv_append_build_options(HIGHGUI GTKGLEXT)
  endif()
  endif()
  endif()
  