Function warnfon

third-party/lua-5.5.0/src/lauxlib.c:1123–1128

static void warnfon (void *ud, const char *message, int tocont) {
  if (checkcontrol((lua_State *)ud, message, tocont))  /* control message? */
    return;  /* nothing else to be done */
  lua_writestringerror("%s", "Lua warning: ");  /* start a new warning */
  warnfcont(ud, message, tocont);  /* finish processing */
}