GetNextItem() now checks for item < GetItemCount() to avoid illegal

wxList access beyond end of list.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1785 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/listctrl.cpp

@@ -2033,6 +2033,7 @@ long wxListMainWindow::GetNextItem( long item, int WXUNUSED(geometry), int state
 {
     long ret = 0;
     if (item > 0) ret = item;
+    if(item >= GetItemCount()) return -1;
     wxNode *node = m_lines.Nth( ret );
     while (node)
     {