add missing \n to error message

Originally committed as revision 19313 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/libvorbis.c

@@ -90,7 +90,7 @@ static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext) {
 
     vorbis_info_init(&context->vi) ;
     if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
-        av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed") ;
+        av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed\n") ;
         return -1 ;
     }
     vorbis_analysis_init(&context->vd, &context->vi) ;