[PATCH] Fixing Alias-Avoidance Padding for MS-ABI Layout

[Warren Hunt]

  Note to self:
    if (const RecordType *RT =
        FD->getType()->getBaseElementTypeUnsafe()->getAs<RecordType>()) {
      const ASTRecordLayout &Layout = Context.getASTRecordLayout(RT->getDecl());
      if (Layout.hasZeroSizedMemberOrBase())
        HasZeroSizedMemberOrBase = true;
    }

  should move inside getAdjustedFieldInfo, in order to merge better with the RequiredAlignment patch.
  http://llvm-reviews.chandlerc.com/D2283

http://llvm-reviews.chandlerc.com/D2258