Core/SAI: Add the ability to set UNIT_FIELD_BYTES_1 in SAI (action 90)

src/server/game/AI/SmartScripts/SmartScriptMgr.cpp

@@ -766,6 +766,7 @@ bool SmartAIMgr::IsEventValid(SmartScriptHolder &e)
         case SMART_ACTION_CALL_RANDOM_TIMED_ACTIONLIST:
         case SMART_ACTION_CALL_RANDOM_RANGE_TIMED_ACTIONLIST:
         case SMART_ACTION_RANDOM_MOVE:
+        case SMART_ACTION_SET_UNIT_FIELD_BYTES_1:
             break;
         default:
             sLog->outErrorDb("SmartAIMgr: Not handled action_type(%u), event_type(%u), Entry %d SourceType %u Event %u, skipped.", e.GetActionType(), e.GetEventType(), e.entryOrGuid, e.GetScriptType(), e.event_id);