trunk preprocessor: added missing headers in IncidenceMatrix.cc (otherwise...

trunk preprocessor: added missing headers in IncidenceMatrix.cc (otherwise fails to compile with gcc 4.3)


git-svn-id: https://www.dynare.org/svn/dynare/dynare_v4@2259 ac1d8469-bf42-47a9-8791-bf33cf982152