bugfixes of solvePIChart

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/asrr@177 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
only show result from lpSolveAPI, without going through all possible combinations

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/asrr@178 edb9625f-4e0d-4859-8d74-9fd3b1da38cb