Fix bug 911: m_extractedDataAreDirty was not initialized in UmfPackLU
Fix bug 911: m_extractedDataAreDirty was not initialized in UmfPackLU

madlib/eigen_backup,mjbshaw/Eigen,madlib/eigen_backup,mjbshaw/Eigen,mjbshaw/Eigen,rotorliu/eigen,rotorliu/eigen,rotorliu/eigen,madlib/eigen_backup,mjbshaw/Eigen,rotorliu/eigen,madlib/eigen_backup