struct.c: avoid inadvertent symbol creation
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40101 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
struct.c: avoid inadvertent symbol creation
(rb_struct_aref): ditto.
(rb_struct_aset): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40101 b2dd03c8-39d4-4d8f-98ff-823fe69b080e