Fix t mode week param

[renerocksai]

Hi, below code fixes the week (day of week) param passed to calendar actions for the CalendarT command (dir="T").

[mrshu]

@mattn would you have a bit of time to take a look at this? It seems it's the only thing stopping @renerocksai from having a fork at https://github.com/renerocksai/calendar-vim

Thanks!