table: remove unnecessary type casting
table: remove unnecessary type casting

ASLen() is an interface method

Signed-off-by: ISHIDA Wataru <15703620d0b11e835ab4f34ebf88f2f40cce783e@lab.ntt.co.jp>

ramrunner/gobgp,a16/gobgp,osrg/gobgp,ishidawataru/gobgp,j-kato/gobgp,ramrunner/gobgp,tamihiro/gobgp,osrg/gobgp,a16/gobgp,a16/gobgp,h-naoto/gobgp,YujiOshima/gobgp,a16/gobgp,j-kato/gobgp,fujita/gobgp,tamihiro/gobgp,osrg/gobgp,fujita/gobgp,tamihiro/gobgp,ishidawataru/gobgp,osrg/gobgp,YujiOshima/gobgp,tamihiro/gobgp,fujita/gobgp,h-naoto/gobgp,Dipsingh/gobgp,ishidawataru/gobgp,fujita/gobgp,a16/gobgp,YujiOshima/gobgp,Dipsingh/gobgp,Dipsingh/gobgp,h-naoto/gobgp,ramrunner/gobgp,j-kato/gobgp,a16/gobgp,a16/gobgp