[FIX] replace generic but MSVC-incompatible macro check with hardcoded BSD
[FIX] replace generic but MSVC-incompatible macro check with hardcoded BSD

xenigmax/seqan,xenigmax/seqan,xenigmax/seqan,xenigmax/seqan,xenigmax/seqan,xenigmax/seqan,xenigmax/seqan,xenigmax/seqan