[boost] [lambda] throw_action is sometimes declared as a struct and sometimes as a class

From: Yariv Tal (yariv_tal2003_at_[hidden])
Date: 2005-02-23 11:54:50

This is not serious, but does cause warnings on my VC7.1
(I could suppress them but I like staying tidy so I want to
be warned when I am not consistent with the struct/class
usage)