Hi Henri,
i tried to compile 1.30.0 and it failed with a missing define for llassert. Adding the #include "llerror.h" to llrefcount.h obviously fixes it.
Only changes in my build are some different compile flags here and there (AVX2 & NETBIOS=OFF) to get a PDB and minor AMD & PROTECTSTACK (+ /guard:cf) tuning, but that shouldn't do much.