TerraTreeViewSkin throws  exception when its container's width is so narrow 
that the node is mostly clipped.
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                 Key: PIVOT-417
                 URL: https://issues.apache.org/jira/browse/PIVOT-417
             Project: Pivot
          Issue Type: Bug
          Components: wtk-terra
    Affects Versions: 1.4
         Environment: Windows 7, JDK 1.7.0 64-bit
            Reporter: Scott Baxter
            Priority: Trivial


I placed a tree view in the left pane of a split pane.  When I resize the tree 
view's split pane down to the point that the tree view is almost not visible 
(perhaps the icon but not the text), the tree view starts throwing exceptions:

Exception thrown during paint(): java.lang.IllegalArgumentException: width is 
negative.
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: 
width is negative.
        at org.apache.pivot.wtk.Component.setSize(Unknown Source)
        at org.apache.pivot.wtk.content.TreeViewNodeRenderer.setSize(Unknown 
Source)
        at org.apache.pivot.wtk.skin.terra.TerraTreeViewSkin.paint(Unknown 
Source)
        ....

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