http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt?id=5f5cb2767618ad22a5608142513c7dd81927a8d5#n111
Fixed - thanks: http://cgit.freedesktop.org/xorg/proto/randrproto/commit/?id=4d8e809684dedb970001099076bb62a38fcd82ca
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