Fix the move to root dir feature.

code/rest/matter_service.go

@@ -962,12 +962,14 @@ func (this *MatterService) WrapParentDetail(request *http.Request, matter *Matte
 
 	puuid := matter.Puuid
 	tmpMatter := matter
+	if matter.Uuid != MATTER_ROOT {
 		for puuid != MATTER_ROOT {
 			pFile := this.matterDao.CheckByUuid(puuid)
 			tmpMatter.Parent = pFile
 			tmpMatter = pFile
 			puuid = pFile.Puuid
 		}
+	}
 
 	return matter
 }