Fix replying to a forwarded message with a single attendee.
Fix replying to a forwarded message with a single attendee.

svn path=/branches/kdepim/enterprise/kdepim/; revision=657604

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi