Fix for Bug #882413 (https://bugs.launchpad.net/fluidity/+bug/882413), introduced in revision 3741 (Bug #876295):  * in search_for_detectors don't do the local picker lookup on empty detector lists
Fix for Bug #882413 (https://bugs.launchpad.net/fluidity/+bug/882413), introduced in revision 3741 (Bug #876295):
 * in search_for_detectors don't do the local picker lookup on empty detector lists

rjferrier/fluidity,iakovos-panourgias/fluidity,iakovos-panourgias/fluidity,jjo31/ATHAM-Fluidity,jrper/fluidity,rjferrier/fluidity,jjo31/ATHAM-Fluidity,jjo31/ATHAM-Fluidity,jrper/fluidity,jrper/fluidity,jrper/fluidity,jjo31/ATHAM-Fluidity,rjferrier/fluidity,jrper/fluidity,iakovos-panourgias/fluidity,iakovos-panourgias/fluidity,iakovos-panourgias/fluidity,rjferrier/fluidity,jjo31/ATHAM-Fluidity,rjferrier/fluidity