added msvc ifdef for ssize_t
added msvc ifdef for ssize_t

AndreLei/ArkInC,AndreLei/ArkInC,AndreLei/ArkInC,AndreLei/ArkInC,AndreLei/ArkInC,AndreLei/ArkInC,AndreLei/ArkInC,AndreLei/ArkInC,AndreLei/ArkInC