From: Eric Wong <normalperson@...>
Date: 2014-03-02T04:01:38+00:00
Subject: [ruby-core:61217] do/while(0) for GetDBM* macros

Btw, zzak's recent commits also highlighted some bad CPP style
for the GetDBM macros.  I will commit the following:
http://bogomips.org/ruby.git/patch?id=d8029dfdb9661

ref: http://c-faq.com/cpp/multistmt.html