CanvasX11GLX: Updates to handle the API change for GLX_EXT_swap_control
(The spec always had a void return value for glXSwapIntervalEXT, however, the
original example and protocol had a return value of int.  To make matters worse,
the header files in mesa were updated a year after the spec.).  Also, make the
GLX_MESA_swap_control initialization match the new logic for GLX_EXT_swap_control.
1 file changed