[base] Fix integer overflows in dd5718c7d6.

* src/base/ftoutln.c (FT_Outline_EmboldenXY): Use FT_MulDiv.

ChangeLog

@@ -1,3 +1,9 @@
+2012-11-15  Alexei Podtelezhnikov  <apodtele@gmail.com>
+
+	[base] Fix integer overflows in dd5718c7d67a.
+
+	* src/base/ftoutln.c (FT_Outline_EmboldenXY): Use FT_MulDiv.
+
 2012-11-15  Werner Lemberg  <wl@gnu.org>
 
 	[autofit] Trace stem widths.

src/base/ftoutln.c

@@ -968,13 +968,13 @@
           if ( orientation == FT_ORIENTATION_TRUETYPE )
             q = -q;
 
-          if ( xstrength * q < d * l )
+          if ( FT_MulDiv( xstrength, q, l ) < d )
             shift.x = FT_MulDiv( shift.x, xstrength, d );
           else
             shift.x = FT_MulDiv( shift.x, l, q );
 
           
-          if ( ystrength * q < d * l )
+          if ( FT_MulDiv( ystrength, q, l ) < d )
             shift.y = FT_MulDiv( shift.y, ystrength, d );
           else
             shift.y = FT_MulDiv( shift.y, l, q );