Incorrectly sets the number of comments

[stas.agarkov@…]

email2trac incorrectly sets the number of comments, because it is based on a number of changes to the table ticket_change. trac uses the TicketModule?.grouped_changelog_entries, which returns a list of changes, in which simultaneous changes are grouped into one that is as it appears in the trac. Your code:

## How many changes has this ticket
#
cnum = len(tkt.get_changelog())

Right code:

# How many changes has this ticket
from trac.ticket.web_ui import TicketModule
grouped = TicketModule(self.env).grouped_changelog_entries(tkt, self.db)
cnum = sum(1 for e in grouped) + 1

[bas]

(In [486]) Fixed the calculation of number of ticket changes, closes #223

[bas]

Thanks for the patch