Modified the getXXBounds methods so that null bounds are possible, to represent GraphicsNode with no content, which may happen on empty group. Previously, empty groups were reporting a Rectangle(0, 0, 0, 0) bounds which would cause potentially large errors/problems.
Modified the getXXBounds methods so that null bounds are possible,
to represent GraphicsNode with no content, which may happen on empty
group. Previously, empty groups were reporting a Rectangle(0, 0, 0, 0)
bounds which would cause potentially large errors/problems.

Benchmarks showed no performance degradation due to that change.
PR:
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git-svn-id: 761cee9cd64d065b967522152dca98f4d60d94f4@199485 13f79535-47bb-0310-9956-ffa450edef68

Squeegee/batik,Squeegee/batik,Squeegee/batik