UNALIGNED_MEMBER_ACCESS only for clang
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59451 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
UNALIGNED_MEMBER_ACCESS only for clang
gcc does not complain about pointers to member of unaligned
struct.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59451 b2dd03c8-39d4-4d8f-98ff-823fe69b080e