java.lang.ArrayIndexOutOfBoundsException with Spreadsheet demo applet when clicking on cells. I've seen this on Solaris and Win32.

Steps to reproduce:
1) Launch the Spreadsheet demo applet
2) Click on the cells in the applet window

Results:
Exception occurred during event dispatching:
java.lang.ArrayIndexOutOfBoundsException: -1
        at SpreadSheet.mousePressed(Compiled Code)
        at java.awt.AWTEventMulticaster.mousePressed(Compiled Code)
        at java.awt.AWTEventMulticaster.mousePressed(Compiled Code)
        at java.awt.Component.processMouseEvent(Compiled Code)
        at java.awt.Component.processEvent(Compiled Code)
        at java.awt.Container.processEvent(Compiled Code)
        at java.awt.Component.dispatchEventImpl(Compiled Code)
        at java.awt.Container.dispatchEventImpl(Compiled Code)
        at java.awt.Component.dispatchEvent(Compiled Code)
        at java.awt.EventQueue.dispatchEvent(Compiled Code)
        at java.awt.EventDispatchThread.run(Compiled Code)

This is also fixed in 1.3.1_01a.

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