fftool/ffplay: avoid same name in local variable

There is a warning in XCode:"Declaration shadows a local variable"

Signed-off-by: xufuji456 <839789740@qq.com>
Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

fftools/ffplay.c

@@ -1930,11 +1930,11 @@ static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const c
         if (sd)
             displaymatrix = (int32_t *)sd->data;
         if (!displaymatrix) {
-            const AVPacketSideData *sd = av_packet_side_data_get(is->video_st->codecpar->coded_side_data,
-                                                                 is->video_st->codecpar->nb_coded_side_data,
-                                                                 AV_PKT_DATA_DISPLAYMATRIX);
-            if (sd)
-                displaymatrix = (int32_t *)sd->data;
+            const AVPacketSideData *psd = av_packet_side_data_get(is->video_st->codecpar->coded_side_data,
+                                                                  is->video_st->codecpar->nb_coded_side_data,
+                                                                  AV_PKT_DATA_DISPLAYMATRIX);
+            if (psd)
+                displaymatrix = (int32_t *)psd->data;
         }
         theta = get_rotation(displaymatrix);