[freetype2] master 98967b7: Add comment.

[Alexei Podtelezhnikov]

branch: master
commit 98967b77e51f1108b9a73f7c59c5145e6ba848d8
Author: Alexei Podtelezhnikov <address@hidden>
Commit: Alexei Podtelezhnikov <address@hidden>

    Add comment.
---
 src/smooth/ftgrays.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c
index 9b008a0..885b0df 100644
--- a/src/smooth/ftgrays.c
+++ b/src/smooth/ftgrays.c
@@ -1083,6 +1083,8 @@ typedef ptrdiff_t  FT_PtrDist;
     if ( dx < ONE_PIXEL / 4 )
       goto Draw;
 
+    /* we can calculate the number of necessary bisections because  */
+    /* each bisection predictably reduces deviation at least 4-fold */
     level = 0;
     do
     {