GeoIP2 support breaks compilation on Windows
c:\cygwin64\home\jenkins\workspace\bind9-master-win2012-x64-vs2017\lib\dns\include\dns\geoip.h(110): error C2016: C requires that a struct or union has at least one member [c:\cygwin64\home\jenkins\workspace\bind9-master-win2012-x64-vs2017\lib\ns\win32\libns.vcxproj]
https://jenkins.isc.org/job/bind9-master-win2012-x64-vs2017/247/
Edited by Michał Kępień