Close serial connection for ZeDMD on Dispose(),

[mkalkbrenner]

closes #474

[freezy]

#477 fixes the multi disposal. You should open the connection on Init() and close it on Dispose(). Does that make this PR obsolete?

[mkalkbrenner]

#477 fixes the multi disposal. You should open the connection on Init() and close it on Dispose(). Does that make this PR obsolete?

No, at the moment we don't close the connection on Dispose(). So the PR should be required.

The downside is that you can't open multiple subsequent tables in VPX anymore but need to close VPX after each table.

[freezy]

The downside is that you can't open multiple subsequent tables in VPX anymore but need to close VPX after each table.

What's the upside, then? ;)

[mkalkbrenner]

If you use a frontend that uses dmdext to show something on the DMD, the connection needs to be closed before VPX gets started. That's how the other DMDs behave as well.