[mapguide-internals] Patch for ticket 2405 (mgserver crash in rare occasions)

[Jackie Ng]

Hi All,

I've attached a patch for ticket 2405 (mgserver crash in rare occasions)

http://trac.osgeo.org/mapguide/ticket/2405

If width = 0 causes an access violation and the width itself is an unsigned
integer, it means the smallest allowed value has to be 1. So the valid width
either has to be 1 or the value of (imaxx - iminx + 1), whichever one is
bigger.

This patch forces a valid width by returning the rs_max() of the two above
values which is then passed into copy_hline() in AGGRenderer::SetPolyClip().

I see no noticeable changes to my naked eye in any of the rendering test
results with this patch.

Please review. Thanks

- Jackie





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