make it possible to set the ksvideosrc device-index through the  PSI_KSVIDEOSRC_INDEX environment variable.  this should suffice as a  lame hack until we have real device enumeration support with ksvideosrc.
make it possible to set the ksvideosrc device-index through the 
PSI_KSVIDEOSRC_INDEX environment variable.  this should suffice as a 
lame hack until we have real device enumeration support with ksvideosrc.


git-svn-id: c8e15679f62162744607fb5135e11e07de46de6b@566 ac7a513c-5e3a-0410-af42-968c3ac6e7dc

andrevmatos/psimedia,andrevmatos/psimedia