Minor correction to kern mask checking

src/hb-ot-shape-fallback.cc

@@ -430,8 +430,8 @@ _hb_ot_shape_fallback_kern (const hb_ot_shape_plan_t *plan,
 			    hb_font_t *font,
 			    hb_buffer_t  *buffer)
 {
-  hb_mask_t kern_mask = plan->map.get_1_mask (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction) ?
-					      HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));
+  hb_mask_t kern_mask = plan->map.get_mask (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction) ?
+					    HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));
   if (!kern_mask) return;
 
   unsigned int count = buffer->len;