vm_method.c: check if klass is 0
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45387 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm_method.c: check if klass is 0
for a method aliased in a module. [ruby-core:61636] [Bug #9663]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45387 b2dd03c8-39d4-4d8f-98ff-823fe69b080e