(backport 21.1) Xnest: fix broken exposure events
Xnest fails to properly pass through expose events: the coordinates are miscalculated in xnestCollectExposures(), before miSendExposures() is called.
Closes: #1735 (closed)
Closes: #132
Fixes: 605e6764 Fix Motif menu drawing in Xnest
Backport-Of: !1397 (closed)
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net