classic/xlib: Fix the build after !9817
This commit mostly exists to be backported to 21.1.x, because the classic binding to xlib is soon to be retired.
Fixes: 4daef7ff mesa: Remove redundant gl_config::sampleBuffers Closes: #4900 (closed)
This commit mostly exists to be backported to 21.1.x, because the classic binding to xlib is soon to be retired.
Fixes: 4daef7ff mesa: Remove redundant gl_config::sampleBuffers Closes: #4900 (closed)