Industrial components package: improvements from Jurassic Pork.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41376 4005530d-fff6-0310-9dd1-cebe43e6787f
Industrial components example, fix compilation.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41377 4005530d-fff6-0310-9dd1-cebe43e6787f