checkint 306 lib/lua/lauxlib.c if (checkint(L, 1) >= 0) { /* is there a numeric field `n'? */ checkint 326 lib/lua/lauxlib.c if ((n = checkint(L, 1)) >= 0) return n; checkint 330 lib/lua/lauxlib.c if ((n = checkint(L, 2)) >= 0) return n;