Avoid retaining field for Symbol.initOwner
Avoid retaining field for Symbol.initOwner

It was accidentally captured due the the reference from a
by-name parameter in the constuctor.

scala/scala,martijnhoekstra/scala,lrytz/scala,martijnhoekstra/scala,scala/scala,lrytz/scala,lrytz/scala,martijnhoekstra/scala,scala/scala,lrytz/scala,scala/scala,lrytz/scala,scala/scala,lrytz/scala,martijnhoekstra/scala,scala/scala,martijnhoekstra/scala,martijnhoekstra/scala