Fixed bug CORE-4100 : Automatic sweep could be run when there is no need for it

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58075 65644016-39b1-43b1-bf79-96bc8fe82c15
Misc.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58077 65644016-39b1-43b1-bf79-96bc8fe82c15