Minor touch-up for recent change

src/hb-ot-var-avar-table.hh

@@ -60,13 +60,13 @@ struct AxisValueMap
 
 struct SegmentMaps : ArrayOf<AxisValueMap>
 {
-  int map (int value, unsigned int from_stride = 0, unsigned int to_stide = 1) const
+  int map (int value, unsigned int from_offset = 0, unsigned int to_offset = 1) const
   {
+#define fromCoord coords[from_offset]
+#define toCoord coords[to_offset]
     /* The following special-cases are not part of OpenType, which requires
      * that at least -1, 0, and +1 must be mapped. But we include these as
      * part of a better error recovery scheme. */
-#define fromCoord coords[from_stride]
-#define toCoord coords[to_stide]
     if (len < 2)
     {
       if (!len)