table: make clear function to sort paths
table: make clear function to sort paths

We want to check out if two pointers are same or different here. Make
the code clear.

Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

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