Fix window resize

zig/sdl/hello_sdl.zig

    }
    var glyph_height = c.TTF_FontLineSkip(font);
    const window_width = glyph_width * 100;
    const window_height = glyph_height * 20;
    var window_width = glyph_width * 100;
    var window_height = glyph_height * 20;
    const screen = c.SDL_CreateWindow("hello fonts", c.SDL_WINDOWPOS_CENTERED, c.SDL_WINDOWPOS_CENTERED, window_width, window_height, c.SDL_WINDOW_BORDERLESS) orelse {
        c.SDL_Log("Unable to create window: %s", c.SDL_GetError());
        return error.SDLInitializationFailed;
                c.SDL_WINDOWEVENT => {
                    switch (event.window.event) {
                        c.SDL_WINDOWEVENT_SIZE_CHANGED => {
                            surface = c.SDL_GetWindowSurface(screen);
                            window_width = event.window.data1;
                            window_height = event.window.data2;
                        },
                        else => {},
                    }
        const text = c.TTF_RenderUTF8_Shaded(font, &msg, white, black);
        const texture = c.SDL_CreateTextureFromSurface(renderer, text);
        c.SDL_FreeSurface(text);
        _ = c.SDL_RenderCopy(renderer, texture, null, &c.SDL_Rect{ .x = 0, .y = 0, .w = window_width, .h = glyph_height });
        _ = c.SDL_RenderCopy(renderer, texture, null, &c.SDL_Rect{ .x = 0, .y = 0, .w = @intCast(c_int, msg.len) * glyph_width, .h = glyph_height });
        var i: c_int = 1;
        var lines = std.mem.split(result, "\n");