hg: openjfx/8u-dev/rt: RT-39822: Accidentally adding same TableColumn twice is allowed and causes late and hard to interpret java.lang.UnsupportedOperationException

[jonathan.giles at oracle.com]

Changeset: 8f025e96a960
Author:    jgiles
Date:      2015-01-20 11:44 +1300
URL:       http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/8f025e96a960

RT-39822: Accidentally adding same TableColumn twice is allowed and causes late and hard to interpret java.lang.UnsupportedOperationException

! modules/controls/src/main/java/javafx/scene/control/TableView.java
! modules/controls/src/main/java/javafx/scene/control/TreeTableView.java
! modules/controls/src/test/java/javafx/scene/control/TableViewTest.java
! modules/controls/src/test/java/javafx/scene/control/TreeTableViewTest.java