[freetype2] master a3754d6: Comment.

[Alexei Podtelezhnikov]

branch: master
commit a3754d662652e12da290e504692ac08538bc1dd8
Author: Alexei Podtelezhnikov <address@hidden>
Commit: Alexei Podtelezhnikov <address@hidden>

    Comment.
---
 src/smooth/ftgrays.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c
index c590cce..349af7f 100644
--- a/src/smooth/ftgrays.c
+++ b/src/smooth/ftgrays.c
@@ -341,7 +341,8 @@ typedef ptrdiff_t  FT_PtrDist;
 
   /* Compute `dividend / divisor' and return both its quotient and     */
   /* remainder, cast to a specific type.  This macro also ensures that */
-  /* the remainder is always positive.                                 */
+  /* the remainder is always positive.  We use the remainder to keep   */
+  /* track of accumulating errors and compensate for them.             */
 #define FT_DIV_MOD( type, dividend, divisor, quotient, remainder ) \
   FT_BEGIN_STMNT                                                   \
     (quotient)  = (type)( (dividend) / (divisor) );                \