message: _WIN32 posix_memalign _aligned_malloc macro
diff: #include "fespace.hpp"
  #ifdef _WIN32
  -#define posix_memalign(p, a, s) (((*(p)) = _aligned_malloc((s), (a))), *(p) ?0)
  +#define posix_memalign(p,a,s) (((*(p))=_aligned_malloc((s),(a))),*(p)?0:errno)
  #endif
  namespace mfem
  