xmlparse.c of expat v.2.1.1 fails to compile on Visual Studio 2010 if XML_CONTEXT_BYTES is defined (whereas v2.1.0 worked)
see https://ci.appveyor.com/project/tbeu/externdata/build/2.0.0-dev+build.65/job/1hwo342fbxjnasn2#L485
reason: C99 style declaration is not supported by VS2010 (but VS2013 and newer)
see https://github.com/tbeu/ExternData/commit/09e0e93da00a53ba506677643a119ff8e0a7d6ea for a fix
Thanks for the patch! It's applied as 247cc3af30028a0ba9e5f5567aa917d38e226cf8 now. I hope you forgive that I made a tiny modification. Vielen Dank :)