input-events is always ignored for the first action (WF) of the coordinator if the instance is set to ${coord:current(-1)}

Hi,

We've noticed that if you have a definition like this in the coordinator.xml, then the first action is always released and the existence of the data dependency is never checked/verified. This only seems to happen with the value "-1" and nothing else ("0", any other positive or negative value seems to be fine).

I currently don't have access to a more recent release, but I also couldn't locate a bug related to this in here.

  <input-events>
    <data-in name="input-my-dataset" dataset="my-dataset">
      <instance>${coord:current(-1)}</instance>
    </data-in>
  </input-events>