Include dup/drop info if any frames where duplicated or droped

instead of when verbose>1.
From ffmbc0.3

Originally committed as revision 20865 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -1241,7 +1241,7 @@ static void print_report(AVFormatContext **output_files,
             "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
             (double)total_size / 1024, ti1, bitrate);
 
-        if (verbose > 1)
+        if (nb_frames_dup || nb_frames_drop)
           snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
                   nb_frames_dup, nb_frames_drop);