px is shown instead of em in some calcul.

[SuperPat45]

Hi,
In Telerik kendo UI core, you can see:

@calendar-cell-width: ((34px / 14px) * 1em);
.k-calendar
{
    width: (@calendar-cell-width * 7);
}

If you compile this with less4j, the result is:

.k-calendar
{
    width: 17px;
}

Instead of this if compiled with glup-less:

.k-calendar
{
    width: 17em;
}