avformat/smacker: Fix number suffix

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 465f3705)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/smacker.c

@@ -321,7 +321,7 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
                 int err;
 
                 size = avio_rl32(s->pb) - 4;
-                if (!size || size + 4L > frame_size) {
+                if (!size || size + 4LL > frame_size) {
                     av_log(s, AV_LOG_ERROR, "Invalid audio part size\n");
                     return AVERROR_INVALIDDATA;
                 }