From 537dc5f290720e0884b8bbe9378a7f9f60170009 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sat, 26 Aug 2023 23:22:03 +0200
Subject: [PATCH] Fix crash on DPI change for wxStaticBox without a control
 label

Check that we have a label before repositioning it fix the crash
introduced by 54684be79d (Fix position of label window in wxStaticBox
after DPI change, 2023-08-05).

See #23740, #23826.

(cherry picked from commit 329d35b922aa893c292d14061fb099aacb4af20b)
---
 src/msw/statbox.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/msw/statbox.cpp b/src/msw/statbox.cpp
index 3d8e4562e2..75460e5e60 100644
--- a/src/msw/statbox.cpp
+++ b/src/msw/statbox.cpp
@@ -310,7 +310,8 @@ WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPar
 
 void wxStaticBox::OnDPIChanged(wxDPIChangedEvent& WXUNUSED(event))
 {
-    PositionLabelWindow();
+    if ( m_labelWin )
+        PositionLabelWindow();
 }
 
 // ----------------------------------------------------------------------------