avformat/adp, svs: Remove redundant av_shrink_packet()

av_get_packet() already makes sure that the packet size is accurate
and that the packet data is zero-padded even when one could not read as
much as desired.

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/adp.c

@@ -75,13 +75,9 @@ static int adp_read_packet(AVFormatContext *s, AVPacket *pkt)
         return AVERROR_EOF;
 
     ret = av_get_packet(s->pb, pkt, size);
+    if (ret < 0)
+        return ret;
 
-    if (ret != size) {
-        if (ret < 0) {
-            return ret;
-        }
-        av_shrink_packet(pkt, ret);
-    }
     pkt->stream_index = 0;
 
     return ret;

libavformat/svs.c

@@ -79,7 +79,6 @@ static int svs_read_packet(AVFormatContext *s, AVPacket *pkt)
     if (ret != 32 * 256) {
         if (ret < 0)
             return ret;
-        av_shrink_packet(pkt, ret);
         pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     }
     pkt->stream_index = 0;