fix for assertion failure

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8506 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/contrib/src/gizmos/splittree.cpp b/contrib/src/gizmos/splittree.cpp
index fbb38850814e86fd26ea644061626c440785362d..a99b6733c8198c6c625c0bd191b4a07cb1c3e1d9 100644 (file)
--- a/contrib/src/gizmos/splittree.cpp
+++ b/contrib/src/gizmos/splittree.cpp
@@ -427,7 +427,7 @@ void wxTreeCompanionWindow::OnPaint(wxPaintEvent& event)
                        dc.DrawLine(0, cy, clientSize.x, cy);
                }
        }
-       if (m_treeCtrl->GetBoundingRect(lastH, itemRect))
+       if (lastH.IsOk() && m_treeCtrl->GetBoundingRect(lastH, itemRect))
        {
                cy = itemRect.GetBottom();
                dc.DrawLine(0, cy, clientSize.x, cy);