Merged revisions 61717 via svnmerge from

https://svn.boost.org/svn/boost/trunk

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  r61717 | eric_niebler | 2010-04-30 16:48:20 -0700 (Fri, 30 Apr 2010) | 1 line
  
  replace non-portable using declarations with typedefs
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[SVN r61724]

libs/xpressive

@@ -1 +1 @@
-Subproject commit 2fac751f2e1309561e5763e042f91e45a0bd40e8
+Subproject commit b597ec29a6266dfc63a8bfba9f9df85fdad23fef