marshal native error messages to propagate to exception if HAL could not
marshal native error messages to propagate to exception if HAL could not

* src/AudioCdCore.cs: marshal native error messages to propagate to
    exception if HAL could not be initialized

eeejay/banshee,ixfalia/banshee,allquixotic/banshee-gst-sharp-work,babycaseny/banshee,Dynalon/banshee-osx,dufoli/banshee,arfbtwn/banshee,lamalex/Banshee,arfbtwn/banshee,ixfalia/banshee,eeejay/banshee,petejohanson/banshee,eeejay/banshee,dufoli/banshee,mono-soc-2011/banshee,lamalex/Banshee,lamalex/Banshee,directhex/banshee-hacks,lamalex/Banshee,GNOME/banshee,directhex/banshee-hacks,GNOME/banshee,Carbenium/banshee,Dynalon/banshee-osx,Carbenium/banshee,stsundermann/banshee,allquixotic/banshee-gst-sharp-work,mono-soc-2011/banshee,stsundermann/banshee,GNOME/banshee,lamalex/Banshee,Dynalon/banshee-osx,Carbenium/banshee,GNOME/banshee,arfbtwn/banshee,mono-soc-2011/banshee,babycaseny/banshee,stsundermann/banshee,petejohanson/banshee,dufoli/banshee,ixfalia/banshee,allquixotic/banshee-gst-sharp-work,directhex/banshee-hacks,babycaseny/banshee,babycaseny/banshee,eeejay/banshee,mono-soc-2011/banshee,stsundermann/banshee,lamalex/Banshee,ixfalia/banshee,arfbtwn/banshee,petejohanson/banshee,GNOME/banshee,Dynalon/banshee-osx,allquixotic/banshee-gst-sharp-work,stsundermann/banshee,babycaseny/banshee,stsundermann/banshee,directhex/banshee-hacks,petejohanson/banshee,arfbtwn/banshee,Carbenium/banshee,allquixotic/banshee-gst-sharp-work,Dynalon/banshee-osx,arfbtwn/banshee,stsundermann/banshee,petejohanson/banshee,babycaseny/banshee,ixfalia/banshee,Carbenium/banshee,GNOME/banshee,allquixotic/banshee-gst-sharp-work,babycaseny/banshee,eeejay/banshee,Dynalon/banshee-osx,Dynalon/banshee-osx,dufoli/banshee,stsundermann/banshee,Dynalon/banshee-osx,directhex/banshee-hacks,ixfalia/banshee,mono-soc-2011/banshee,arfbtwn/banshee,dufoli/banshee,dufoli/banshee,dufoli/banshee,GNOME/banshee,dufoli/banshee,mono-soc-2011/banshee,petejohanson/banshee,Carbenium/banshee,GNOME/banshee,babycaseny/banshee,mono-soc-2011/banshee,ixfalia/banshee,arfbtwn/banshee,directhex/banshee-hacks,ixfalia/banshee