av_log() patch by (Michel Bardiaux <mbardiaux at peaktime dot be>)

Originally committed as revision 2840 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index 6ba5163..a5cd8df 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -773,7 +773,7 @@
             }
         }
 #if 1
-        printf("pts=%0.3f dts=%0.3f pict_type=%c\n", 
+        av_log(&st->codec, AV_LOG_DEBUG, "pts=%0.3f dts=%0.3f pict_type=%c\n", 
                pts / 90000.0, dts / 90000.0, 
                av_get_pict_type_char(st->codec.coded_frame->pict_type));
 #endif