Fix FTBFS with ffmeg 8.0.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

akode/plugins/ffmpeg_decoder/ffmpeg_decoder.cpp

@@ -282,10 +282,10 @@ void FFMPEGDecoder::closeFile() {
     }
 
     if( d->codec ) {
-        avcodec_close( d->audioStream_ctx );
 #if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 33, 100)
         avcodec_free_context(&d->audioStream_ctx);
 #else
+        avcodec_close( d->audioStream_ctx );
         d->audioStream_ctx = NULL;
 #endif
         d->codec = 0;