Half days are dropped from "Vorjahresurlaub" and "Resturlaub"

[UrsKR]

1. With 28 days remaining, I request half a day of leave.
2. I load the page again. My remaining days are rendered as "271/2".
3. I request another day of leave. On the resulting PDF, the days originally remaing are shown as 27. Half a day is lost.