assuan.h:588:2 invalid preprocessing directive (Re: GnuPG 2.5.5 released)

[Ralph Seichter]

* Andreas Metzler:

> https://dev.gnupg.org/rAb8148b4f5735e1215eb72f208e1ae2891213247e

Thanks. I suspected a typo, but since I was able to build GnuPG 2.5.4
with libassuan 3.0.1, I was uncertain if there was perhaps more to it.

-Ralph