make ax.cleanRange work in nested properties

Author: etpinard

src/plots/cartesian/set_convert.js

@@ -254,7 +254,7 @@ module.exports = function setConvert(ax) {
      */
     ax.cleanRange = function(rangeAttr) {
         if(!rangeAttr) rangeAttr = 'range';
-        var range = ax[rangeAttr],
+        var range = Lib.nestedProperty(ax, rangeAttr).get(),
             axLetter = (ax._id || 'x').charAt(0),
             i, dflt;
 
@@ -266,7 +266,7 @@ module.exports = function setConvert(ax) {
         dflt = dflt.slice();
 
         if(!range || range.length !== 2) {
-            ax[rangeAttr] = dflt;
+            Lib.nestedProperty(ax, rangeAttr).set(dflt);
             return;
         }