Fixed an unused parameter warning.
Fixed an unused parameter warning.

vashstorm/msgpack-c,vashstorm/msgpack-c,juanrubio/msgpack-c,GamePad64/msgpack-c,kern/msgpack-c,AALEKH/msgpack-c,soumith/msgpack-c,kern/msgpack-c,lvfeng1130/msgpack-c,jonitis/msgpack-c,jen20/msgpack-c,vashstorm/msgpack-c,soumith/msgpack-c,kern/msgpack-c,GamePad64/msgpack-c,kern/msgpack-c,jonitis/msgpack-c,AALEKH/msgpack-c,AALEKH/msgpack-c,juanrubio/msgpack-c,soumith/msgpack-c,jen20/msgpack-c,jen20/msgpack-c,juanrubio/msgpack-c,jen20/msgpack-c,lvfeng1130/msgpack-c,jonitis/msgpack-c,GamePad64/msgpack-c,lvfeng1130/msgpack-c,soumith/msgpack-c,kern/msgpack-c,vashstorm/msgpack-c,GamePad64/msgpack-c,lvfeng1130/msgpack-c,GamePad64/msgpack-c,juanrubio/msgpack-c,jen20/msgpack-c,soumith/msgpack-c,AALEKH/msgpack-c,vashstorm/msgpack-c,jonitis/msgpack-c,AALEKH/msgpack-c,lvfeng1130/msgpack-c,juanrubio/msgpack-c,jonitis/msgpack-c