git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@31765 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r30922 and r30924 from trunk into ruby_1_9_2.¶
RSTRING_PTR() for function calls since it evaluates the argument
a couple of times.
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@31765 b2dd03c8-39d4-4d8f-98ff-823fe69b080e