array.c: fix false assertions
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41253 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
array.c: fix false assertions
ARY_HEAP_PTR() implies ary not to be embedded. [ruby-dev:47419]
[Bug #8518]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41253 b2dd03c8-39d4-4d8f-98ff-823fe69b080e