fix int->double->int conversion in JsonInt
fix int->double->int conversion in JsonInt

PollRobots/json11,zhenglaizhang/json11,Fifty-Nine/json11,joncampbell123/json11,DominikSadko/json11,cmaughan/json11,yazevnul/json11,Ricardo666666/json11,dropbox/json11,cch123/json11,edwiincao/json11,kaidokert/json11,spongo2/json11,nivwusquorum/json11,libmx3/json11,tempbottle/json11,githubwoniu/json11,githubwoniu/json11