include/ruby/missing.h: defined(__cplusplus) before using __cplusplus
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63572 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
include/ruby/missing.h: defined(__cplusplus) before using __cplusplus
defined(__cplusplus) may be needed before using __cplusplus.
[Bug #14816]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63572 b2dd03c8-39d4-4d8f-98ff-823fe69b080e