Add my name to copyright & author as requested by the original author.

Originally committed as revision 17858 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/timefilter.c

 /*
  * Delay Locked Loop based time filter
  * Copyright (c) 2009 Samalyse
+ * Copyright (c) 2009 Michael Niedermayer
  * Author: Olivier Guilyardi <olivier samalyse com>
+ *         Michael Niedermayer <michaelni gmx at>
  *
  * This file is part of FFmpeg.
  *

libavformat/timefilter.h

 /*
  * Delay Locked Loop based time filter prototypes and declarations
  * Copyright (c) 2009 Samalyse
+ * Copyright (c) 2009 Michael Niedermayer
  * Author: Olivier Guilyardi <olivier samalyse com>
+ *         Michael Niedermayer <michaelni gmx at>
  *
  * This file is part of FFmpeg.
  *