Fix issue #101 : Patch to display audio properties using WAVEFORMATEXFFMPEG
From Grant Simonds. Thanks for the patch, Grant.
"Here's a patch to display the audio properties when using WAVEFORMATEXFFMPEG, it's mostly just WAVEFORMATEX but currently nothing is displayed."

git-svn-id: http://graph-studio-next.googlecode.com/svn/trunk@111 c2f33eb2-41b2-391d-4cb4-d9d0608729ba