fix:bug[18108] 搜索结果-图集卡封面图加载不出，图片数量是-1，见截图

@@ -464,7 +464,7 @@ export struct SearchResultContentComponent {
         contentDTO.tagWord = -1
         contentDTO.isSelect = true
         contentDTO.rmhInfo = {} as RmhInfoDTO
-        contentDTO.photoNum = -1
+        contentDTO.photoNum = photos !=null && photos.length>0 ? photos.length:-1
         contentDTO.liveInfo = {} as LiveInfoDTO;
         contentDTO.videoInfo = {
           videoDuration: Number.parseInt(value.data.duration)