Add explanatory comment to '#define FLOAT float'.

Originally committed as revision 12254 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/faanidct.c b/libavcodec/faanidct.c
index f7bea3e..3844a7b 100644 (file)
--- a/libavcodec/faanidct.c
+++ b/libavcodec/faanidct.c
@@ -20,6 +20,7 @@
  */
 #include "mpegvideo.h"
 
+/* To allow switching to double. */
 #define FLOAT float
 
 #define B0 1.0000000000000000000000