hg: openjfx/8/graphics/rt: RT-32033 NPE in charts when data is modified.

[hang.vo at oracle.com]

Changeset: 2ac7d6a188dd
Author:    psomashe
Date:      2013-10-31 13:41 -0700
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/2ac7d6a188dd

RT-32033 NPE in charts when data is modified.
RT_26955 Can't replace the data in a barchart
reviewed by Jonathan.

! modules/controls/src/main/java/javafx/scene/chart/BarChart.java
! modules/controls/src/main/java/javafx/scene/chart/LineChart.java
! modules/controls/src/main/java/javafx/scene/chart/XYChart.java
! modules/controls/src/test/java/javafx/scene/chart/BarChartTest.java