Save image in PDF

[ricardofrainer-spec]

Brief summary of issue

The program save the capture ok. But, to open that .pdf with another program, like FoxIt, it's say the format pdf is invalid.

Steps to reproduce the issue

Error output (please run as shutter --debug)

Extra information, such as Shutter version, display server in use (Xorg or Wayland), operating system and ideas for how to solve:

[Photon89]

This is a known issue fixed in git, we just haven't released a new version shipping the fix yet: #789. See also issue #788 .