REQ-3754: 避免查询空列表

inside-notices/src/main/java/cn/axzo/msg/center/nimpush/device/PushDeviceService.java

@@ -43,6 +43,8 @@ public class PushDeviceService {
     }
 
     public PushDeviceSnapshots createDeviceSnapshots(Collection<Long> personIds) {
+        if (CollectionUtils.isNotEmpty(personIds))
+            return new PushDeviceSnapshots(this, Collections.emptyList());
         ArrayList<Long> uniquePersonIds = new ArrayList<>(new HashSet<>(personIds));
         BatchFetchDeviceByPersonIdAndTerminalReq request = new BatchFetchDeviceByPersonIdAndTerminalReq();
         request.setPersonIds(uniquePersonIds);