- Return success indication when sending commands.
- Use default parameters from function group (if not overridden by widgets).
- Cache function group NID instead of searching for it every time it's
needed (some of this searching still needs to be eliminated).
- Check that output pins are output-capable and have at least one input node.
- Check that input pins are input-capable.
- Fixed some compiler warnings.
git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@47794 fb15a70f-31f2-0310-bbcc-cdcc74a49acc