[zathura] zathura-pdf-mupdf: red and blue colors inverted

[Leonardo Taccari]

Dear zathura community,
after using zathura-pdf-mupdf in the last weeks I've only recently
noticed that red and blue colors seems inverted.
Can anyone confirm that?

It seems a recent regression of the 0.2.9 release, the attached patch in
this email should fix the problem.


Thank you in advance for your attention!
Ciao,
L.