jack support should be enabled for AMD64

[Stefan Weil]

Hi,

I have the same problem like Frans.

Jack support is still not working with mixxx in Debian Lenny on amd64.
The documentation says that it should be supported.

And this report says that the problem is caused by portaudio19:
https://bugs.launchpad.net/ubuntu/+source/portaudio19/+bug/183011

How can I help to fix this?

Regards

Stefan