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connection: do not abort when dup(fd) fails

M. Stoeckl requested to merge mstoeckl/wayland:clean-dupfail into master

Instead, cleanly exit wl_closure_marshal and let the caller handler the error. For wayland-client, the sole calling function will call wl_abort() anyway. For wayland-server, the calling function will cleanly shutdown the client.

This change ensures that compositors run with low file descriptor limits or internal leaks need not crash suddenly (and sometimes far from the problem) when space runs out.

Signed-off-by: Manuel Stoeckl code@mstoeckl.com

Edited by M. Stoeckl

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