[PATCH Libgpg-error] m4: Fix detection of gpgrt's libdir.

[NIIBE Yutaka]

Damien Goutte-Gattat wrote:
> * src/gpg-error.m4 (GPGRT_CONFIG): Handle the case where none of the
> system lib directories contain a pkgconfig subdirectory.

Thank you.  Applied (adding version update), and pushed.
--