fixed compile

Author: longbai

QiniuSDK/Common/QNPHAssetFile.m

@@ -159,7 +159,7 @@ - (NSData *)fetchDataFromAsset:(PHAsset *)asset
         [[PHImageManager defaultManager] requestAVAssetForVideo:asset
                                                         options:request
                                                   resultHandler:
-         ^(AVAsset * _Nullable asset, AVAudioMix * _Nullable audioMix, NSDictionary * _Nullable info) {
+         ^(AVAsset* asset, AVAudioMix* audioMix, NSDictionary* info) {
              AVURLAsset *urlAsset = (AVURLAsset *)asset;
              NSData *videoData = [NSData dataWithContentsOfURL:urlAsset.URL];
              tmpData = [NSData dataWithData:videoData];