[commit] JSVGCanvas bug fixes

[Bill Haneman <Bi...@ireland.sun.com>]

 Hi:
 
 I have committed fixes for the zoom AOI regression, and
 also removed an unnecessary canvas clear which should eliminate
 some flashing.  
 
 There are still known issues in JSVGCanvas, I have only put back
 the fixes for the above problems at the moment but I have fixes
 in preparation for others.
 
 There is a behavior that is now more visible (I think it was
 always possible) but it may not be "wrong":
 If a new repaint is under way, an incompletely
 repainted buffer may be painted during a pan operation.  The
 alternative might be to maintain more than one buffer and swap
 only after a repaint, but for slow repaints it may be better to
 have a partially completed one than none at all.  
 
 -Bill

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 Fixes for slow zoom AOI redraw, and removed an unnecessary screen clear. 

 Modified Files:
        sources/org/apache/batik/refimpl/util/JSVGCanvas.java
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Bill Haneman +353 1 8199279
Ireland Desktop Engineering
Sun Microsystems Ireland Ltd.