Package: x2goclient Version: 4.0.3.0-preview
So back when I created the fork of VcXsrv called VcXsrv-XP, I was under the impression that the last version of Microsoft Visual Studio to support XP targeting was 2012. Therefore, I based it on the last version of VcXsrv to use VS 2012, 1.14.3. All later versions of VcXsrv require Visual Studio 2013. (There's actually newer C syntax.)
However, I found out that Visual Studio 2013 also supports XP targeting. I must have gotten confused because "Visual Studio 12" is "Visual Studio 2013", not "Visual Studio 2012".
Anyway, this means I should rebase VcXsrv-XP against the latest version of VcXsrv, currently 1.15.2.0, so long as the latest version of VcXsrv still uses Visual Studio 2013. (2014 is not out yet.)