Builtin function 'skew' is missing.

[rruusu]

The builtin function {{skew()}}, which is described on page 77 of the [Modelica 2.2 specification|​http://www.modelica.org/documents/ModelicaSpec22.pdf], is missing from OpenModelica.

Here is an excerpt from the specification:

;skew(x):Returns the 3 x 3 skew symmetric matrix associated with a 3-vector, i.e., cross(x,y) = skew(x)*y; skew(x) = [[0, -x[[3], x[[2]; x[[3], 0, -x[[1]; -x[[2], x[[1], 0];

[sjoelund.se]

This was fixed when I checked it, so I'm closing the bug.