[R-Forge #1719] unique( ITime ) loses ITime attribute and coerces to integer

[arunsrinivasan]

Submitted by: Matt Dowle; Assigned to: Nobody; R-Forge link

t = as.ITime(strptime(c("09:10:00","09:11:00","09:12:00","09:13:00"),"%H:%M:%S"))
t
[1] "09:10:00" "09:11:00" "09:12:00" "09:13:00"
str(t)
Class 'ITime' int [1:4] 33000 33060 33120 33180
unique(t)
[1] 33000 33060 33120 33180