Use s.datapoints instead of s.data in highlight(s, index) to lookup point

git-svn-id: https://flot.googlecode.com/svn/trunk@239 1e0a6537-2640-0410-bfb7-f154510ff394

NEWS.txt

@@ -31,6 +31,10 @@ Bug fixes:
   brightness: x, opacity: y }.
 - Don't use $.browser.msie, check for getContext on the created canvas
   element instead and try to use excanvas if it's not found.
+- highlight(s, index) was looking up the point in the original s.data
+  instead of in the computed datapoints array, which breaks with
+  plugins that modify the datapoints (such as the stacking plugin).
+  Issue 316 reported by curlypaul924.
 
 Flot 0.6
 --------

jquery.flot.js

@@ -1973,8 +1973,10 @@
             if (typeof s == "number")
                 s = series[s];
 
-            if (typeof point == "number")
+            if (typeof point == "number") {
-                point = s.data[point];
+                var ps = s.datapoints.pointsize;
+                point = s.datapoints.points.slice(ps * point, ps * (point + 1));
+            }
 
             var i = indexOfHighlight(s, point);
             if (i == -1) {