NullPointerException in PhotovaultImage#findNamedRendering

[harri]

The following exception was thrown when I

1. Selected image with alpha immediately after starting Photovault
2. Selected Adjust colors
3. Tried to adjust saturation
4. closed the color settings dialog

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at org.photovault.image.PhotovaultImage.findNamedRendering(PhotovaultImage.java:840)
        at org.photovault.image.PhotovaultImage.findNamedRendering(PhotovaultImage.java:842)
        at org.photovault.image.PhotovaultImage.findNamedRendering(PhotovaultImage.java:842)
        at org.photovault.image.PhotovaultImage.findNamedRendering(PhotovaultImage.java:842)
        at org.photovault.image.PhotovaultImage.getHistogram(PhotovaultImage.java:331)
        at org.photovault.swingui.color.ColorSettingsDlg.showCurve(ColorSettingsDlg.java:1049)
        at org.photovault.swingui.color.ColorSettingsDlg.setColorChannelCurve(ColorSettingsDlg.java:1482)
        at org.photovault.swingui.PhotoInfoController$ColorCurveCtrl.updateView(PhotoInfoController.java:186)
        at org.photovault.swingui.FieldController.updateViews(FieldController.java:207)
        at org.photovault.swingui.FieldController.setModel(FieldController.java:139)
        at org.photovault.swingui.PhotoInfoController.discard(PhotoInfoController.java:1002)
        at org.photovault.swingui.color.ColorSettingsDlg.discardChanges(ColorSettingsDlg.java:207)
        at org.photovault.swingui.color.ColorSettingsDlg.closeBtnActionPerformed(ColorSettingsDlg.java:772)
        at org.photovault.swingui.color.ColorSettingsDlg.access$300(ColorSettingsDlg.java:78)
        at org.photovault.swingui.color.ColorSettingsDlg$4.actionPerformed(ColorSettingsDlg.java:354)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:5501)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3135)
        at java.awt.Component.processEvent(Component.java:5266)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3968)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
        at java.awt.Container.dispatchEventImpl(Container.java:2010)
        at java.awt.Window.dispatchEventImpl(Window.java:1778)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

[harri]

Fixed in r750 (trunk) and r751 (0.5.x) as part of fix to #165.