[matrix]: fixed a non-reset bug in kmeans which inflated num iterations
[matrix]: fixed a non-reset bug in kmeans which inflated num iterations

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