because of changes in epanet.c at 2.00.12.
epanet.c changed to comment out definition of DLL, allowing DLL, SOL, or
CLE to be defined at compilation.
git-svn-id: https://epanet.svn.sourceforge.net/svnroot/epanet/BASE/trunk@220 c320cabd-cc23-0410-96d8-e60fbf53ed7f