avcodec/bsf: Set EOF flag only in pkt == NULL

Set BSF EOF flag only if pkt == NULL in av_bsf_send_packet().
Signed-off-by: Jan Sebechlebsky <sebechlebskyjan@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/bsf.c

@@ -172,7 +172,7 @@ int av_bsf_init(AVBSFContext *ctx)
 
 int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
 {
-    if (!pkt || !pkt->data) {
+    if (!pkt) {
         ctx->internal->eof = 1;
         return 0;
     }