[boost] [Serialization] Trac #3604

Hi, Will trac #3604 patch be merged in next release? https://svn.boost.org/trac/boost/attachment/ticket/3604/ticket3064_remove_co... This patch solves the recursive_register order problem. The recursive_register order problem means below. When the new void_caster_shortcut is made from a void_caster_registry member and a current candidate, If the void_caster_registry member includes virtual base and the current candidate doesn't include it, the information includes_virtual_base is lost. This patch fixes such problem. Thanks, Takatoshi Kondo