if table has integer key，when break， show empty table

[xiayong968]

local t = {}
t[1000] = "hi"

---

when break the script，the table t show empty，is it a bug？

[satoren]

That is bug same to #12.

[xiayong968]

i fix it :)

    json::object obj;
    lua_pushnil(L);
    while (lua_next(L, index) != 0) {
      if (lua_type(L, -2) == LUA_TSTRING) {
        const char* key = lua_tostring(L, -2);
        json::value& b = obj[key];
        b = to_json(L, -1, max_recursive - 1);
      } else if (lua_type(L, -2) == LUA_TNUMBER) {
         const char* key = "";
     if (lua_isinteger(L,-2)){
              lua_Integer temp = lua_tointeger(L, -2);	
	  key = int64_to_string(temp);
      }	else{
	   double temp = lua_tonumber(L, -2);
	   key = double_to_string(temp);
	}
            json::value& b = obj[key];
            b = to_json(L, -1, max_recursive - 1);
        }
        lua_pop(L, 1);  // pop value
    }