fix showing first day of week in week view

[mahdifarhang]

Hey there. I had been using your full calendar in a project. Found out that in week's view, there is a problem, that it shows the current day as the first day of the week. First I thought I was passing the arguments wrong, but the first day was showing correct in month view.

Checked the code, and found out that there is a bug. So here is the fix