Single-parameter tquery with SQLQueryParms fixed

[Warren Young]

I believe I've found the proper fix for this problem.  In the Query 
methods that execute queries (execute(), store*(), use()) that take a 
SQLQueryParms reference, add this line above the call to the other overload:

	AutoFlag<> af(def.processing_);

This is for v2.3.  svn has the fix for v3 now already.