merge revision(s) 53322,53323: [Backport #11880]
* ext/win32ole/win32ole.c (ole_vstr2wc, ole_variant2val): fix blank string conversion. [Bug #11880] Thanks Akio Tajima for the patch! string conversion.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54923 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 53322,53323: [Backport #11880]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54923 b2dd03c8-39d4-4d8f-98ff-823fe69b080e