Fix cairo dispose leak
Fix cairo dispose leak

svn path=/trunk/banshee/; revision=2664

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