add CMD_INCREF macro for convinent refcount increament
add CMD_INCREF macro for convinent refcount increament

jasonjoo2010/corvus,doyoubi/corvus,jasonjoo2010/corvus,eleme/corvus,doyoubi/corvus,jasonjoo2010/corvus,doyoubi/corvus,eleme/corvus,eleme/corvus