previewer: Print needs gtk_unix_print to be enabled
Fixes compilation failure:
../previewer/ev-previewer-window.c:266:13: error: ‘ev_previewer_window_print’ undeclared here (not in a function); did you mean ‘ev_previewer_window_init’?
266 | { "print", ev_previewer_window_print },
| ^~~~~~~~~~~~~~~~~~~~~~~~~
| ev_previewer_window_init
Also a whitespace fix (trivial, but my editor does this automatically so makes it easier to create the real change).
Maybe, a documentation or meson_options.txt
change would be good too to clarify that gtk_unix_print
is needed for the Print button on the preview.