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The reason we don't need to do what I say we don't need to do is that a
given counter doesn't really care about whether it has a master. It's
when the master is stepped that we check for which other ones to reset.
So if the master doesn't exist, nothing will happen, anyway.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@37197 a592a061-630c-0410-9148-cb99ea01b6c8