Feature request: have xfce4-screenshooter return non-zero exit code when taking a regional screenshot was aborted via Esc

When doing something like xfce4-screenshooter -r -o myprogram and instead of selecting the region, using Esc to cancel taking a screenshot, xfce4-screenshooter will still open "myprogram". xfce4-screenshooter will return an exit code of 0 just as when the operation is not aborted.

The expected behavior is that it will cancel the process and not open the specified program if taking a screenshot has been cancelled in this manner. It would be nice to know if the user aborted the operation, e.g. by having the screenshooter return a non-zero exit code in that case.