fix memory leak (when conservatively resizing vectors of dynamically allocated scalar types such as bugnums)
fix memory leak (when conservatively resizing vectors of dynamically allocated scalar types such as bugnums)

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