prelude.c.tmpl: get rid of warnings on old gcc
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61524 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
prelude.c.tmpl: get rid of warnings on old gcc
old gcc, e.g. 4.4, which does not support pushing/popping
diagnostics.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61524 b2dd03c8-39d4-4d8f-98ff-823fe69b080e