Merged revisions 55050,55076 via svnmerge from https://svn.boost.org/svn/boost/trunk
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r55050 | eric_niebler | 2009-07-20 16:04:55 -0700 (Mon, 20 Jul 2009) | 1 line
eliminate shadow warnings and unused variable warnings
r55076 | eric_niebler | 2009-07-21 18:34:11 -0700 (Tue, 21 Jul 2009) | 1 line
portability fixed for gcc-4.4