It was returning inverted values in comparison to the 1.4 branch. This resulted in
the windows not drawing due to a deep path of: RootlessReorderWindow ->
SCREENREC(pScreen)->imp->DoReorderWindow(winRec) - > xprDoReorderWindow ->
AppleWMDoReorderWindow.
(cherry picked from commit d1d398db76)
Also fixed DarwinEQEnqueue to match changes to the callback
And also use dpmsstubs.c rather than copying the code into darwin.c
(cherry picked from commit 4c5c30a4be)