Revert r16257:

Include "libavutil/common.h" where we use llrint() in case ffmpeg's
own llrint() is to be used.

Originally committed as revision 16282 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpegaudiodec.c

@@ -27,7 +27,6 @@
 #include "avcodec.h"
 #include "bitstream.h"
 #include "dsputil.h"
-#include "libavutil/common.h"
 
 /*
  * TODO:

libavcodec/opt.c

@@ -28,7 +28,6 @@
 #include "avcodec.h"
 #include "opt.h"
 #include "eval.h"
-#include "libavutil/common.h"
 
 //FIXME order them and do a bin search
 const AVOption *av_find_opt(void *v, const char *name, const char *unit, int mask, int flags){