dix: unexport callback manager init / teardown functions
Those are only needed inside DIX, thus no need to export them.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net
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Those are only needed inside DIX, thus no need to export them.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net