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The workQueue pointer is currently declared extern, so that WaitForSomething() can check wether we've got something in the queue and call ProcessWorkQueue() then. But that's trivial to simplify: just let ProcessWorkQueue() return early if workQueue == NULL. Gives us a better isolation of internal stuff as well as ProcessWorkQueue() protecting itself from possible segfault. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1310>