Saving screenshot as JPEG only produces garbage

[Corin Langosch]

This works as expected:

    image
        .save(format!("monitor-{}.png", normalized(monitor.name())))
        .unwrap();

This produces a completely broken JPEG file:

    image
        .save(format!("monitor-{}.jpg", normalized(monitor.name())))
        .unwrap();

I'm crosscompiling from linux to windows using cargo build --target x86_64-pc-windows-gnu.

[nashaofu]

This should be a bug in crate image，image-rs/image#2188