VS2015 - Solution files has no active configuration

In our build system I build simply by running MSBuild. (VS2015)
Since latest Changes MSBuild won’t work due to not providing ActiveCfg.
This makes ALL my build scripts fail due to not building any project in solution (since they’re not Active …)

Here is a patch that resolves this:
https://github.com/soundradix/JUCE/commit/a25bef76a08059d9aaf00d8403216f823c1bf67f

TL;DR;

out << "\t\t" << target->getProjectGuid() << "." << configName << ".ActiveCfg = " << configName << newLine;

Thank you.

This will appear on the develop branch shortly.