Move av_log2_i()'s unaltered comments to the header file.

Originally committed as revision 8232 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/integer.c

@@ -49,10 +49,6 @@ AVInteger av_sub_i(AVInteger a, AVInteger b){
     return a;
 }
 
-/**
- * returns the rounded down value of the logarithm of base 2 of the given AVInteger.
- * this is simply the index of the most significant bit which is 1. Or 0 of all bits are 0
- */
 int av_log2_i(AVInteger a){
     int i;
 

libavutil/integer.h

@@ -37,6 +37,11 @@ typedef struct AVInteger{
 
 AVInteger av_add_i(AVInteger a, AVInteger b);
 AVInteger av_sub_i(AVInteger a, AVInteger b);
+
+/**
+ * returns the rounded down value of the logarithm of base 2 of the given AVInteger.
+ * this is simply the index of the most significant bit which is 1. Or 0 of all bits are 0
+ */
 int av_log2_i(AVInteger a);
 AVInteger av_mul_i(AVInteger a, AVInteger b);