Fix a crash in the gear tab when an Artifact's relics are not known
Fix a crash in the gear tab when an Artifact's relics are not known

ronaldpereira/WoWAnalyzer,WoWAnalyzer/WoWAnalyzer,FaideWW/WoWAnalyzer,FaideWW/WoWAnalyzer,anom0ly/WoWAnalyzer,sMteX/WoWAnalyzer,yajinni/WoWAnalyzer,Juko8/WoWAnalyzer,fyruna/WoWAnalyzer,WoWAnalyzer/WoWAnalyzer,WoWAnalyzer/WoWAnalyzer,ronaldpereira/WoWAnalyzer,hasseboulen/WoWAnalyzer,hasseboulen/WoWAnalyzer,anom0ly/WoWAnalyzer,fyruna/WoWAnalyzer,Juko8/WoWAnalyzer,yajinni/WoWAnalyzer,ronaldpereira/WoWAnalyzer,fyruna/WoWAnalyzer,anom0ly/WoWAnalyzer,yajinni/WoWAnalyzer,sMteX/WoWAnalyzer,hasseboulen/WoWAnalyzer,FaideWW/WoWAnalyzer,yajinni/WoWAnalyzer,anom0ly/WoWAnalyzer,sMteX/WoWAnalyzer,Juko8/WoWAnalyzer