LibTTF: Use AffineTransform::multiply() instead of * operator

Author: https://github.com/sunverwerth
Commit: 222b7f6c87
Pull-request: https://github.com/SerenityOS/serenity/pull/4631
Issue: https://github.com/SerenityOS/serenity/issues/743
Reviewed-by: https://github.com/alimpfard

Libraries/LibTTF/Glyf.h

@@ -137,7 +137,7 @@ public:
                     break;
                 }
                 auto item = opt_item.value();
-                auto affine_here = affine * item.affine;
+                auto affine_here = affine.multiply(item.affine);
                 auto glyph = glyph_callback(item.glyph_id);
                 glyph.raster_inner(rasterizer, affine_here);
             }