Update main-sdl2.c

[s88100]

• Added to quit_hook() Free resources, Cleanup network stuff, Cleanup WinSock.
• Update main-sdl2.c, V Commits on Oct 20, 2023

code in V https://github.com/angband/angband/commit/569a86e3d9faae7c1e1855454caf539c6082febc

if (s && s[0]) {
    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal Error",
        s, NULL);
}

I removed it because the hook was activated plog_aux = hook_plog;