[Mono-winforms-list] ListBox patch for AddRange problem

[Kazuki Oikawa]

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Hi.

When ListBox.AddRange was called, raised fllowing exception.

Unhandled Exception: System.ArgumentOutOfRangeException: Argument is out of range.
Parameter name: Index of out range
in <0x00059> ObjectCollection:get_Item (int)
in <0x002c9> System.Windows.Forms.ListBox:UpdateItemInfo (System.Windows.Forms.ListBox/UpdateOperation,int,int)
in <0x00068> ObjectCollection:AddRange (object[])

This attached patch will fix this problem.
Anyone, please review this patch.

--
Kazuki Oikawa
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