[Matrix]: fix a bug in test_eigen after merging.
[Matrix]: fix a bug in test_eigen after merging.

zheng-da/FlashX,icoming/FlashX,icoming/FlashGraph,flashxio/FlashX,flashxio/FlashX,icoming/FlashGraph,icoming/FlashGraph,flashxio/FlashX,flashxio/FlashX,zheng-da/FlashX,icoming/FlashX,icoming/FlashX,zheng-da/FlashX,flashxio/FlashX,icoming/FlashX,zheng-da/FlashX,flashxio/FlashX,icoming/FlashGraph,zheng-da/FlashX,icoming/FlashX,icoming/FlashGraph