Fix buffer overflow in choosing map size
Fix buffer overflow in choosing map size

HaliteChallenge/Halite-II,lanyudhy/Halite-II,lanyudhy/Halite-II,lanyudhy/Halite-II,HaliteChallenge/Halite-II,lanyudhy/Halite-II,HaliteChallenge/Halite-II,lanyudhy/Halite-II,lanyudhy/Halite-II,HaliteChallenge/Halite-II,lanyudhy/Halite-II,HaliteChallenge/Halite-II,HaliteChallenge/Halite-II,HaliteChallenge/Halite-II,lanyudhy/Halite-II,HaliteChallenge/Halite-II,HaliteChallenge/Halite-II,HaliteChallenge/Halite-II,HaliteChallenge/Halite-II,lanyudhy/Halite-II,HaliteChallenge/Halite-II,HaliteChallenge/Halite-II,HaliteChallenge/Halite-II,lanyudhy/Halite-II,lanyudhy/Halite-II,HaliteChallenge/Halite-II,HaliteChallenge/Halite-II