From 30c798b70a96636f865b38d896787342150cec3b Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sat, 30 Jun 2018 23:17:37 +0200
Subject: [PATCH] Fix row validity check in MacHandleSelectionChange()

Valid indices must be in [0, count[ half-open interval.
---
 src/osx/listbox_osx.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/osx/listbox_osx.cpp b/src/osx/listbox_osx.cpp
index 01b6ef7f0d..b00514c94f 100644
--- a/src/osx/listbox_osx.cpp
+++ b/src/osx/listbox_osx.cpp
@@ -439,7 +439,7 @@ void wxListBox::MacHandleSelectionChange(int row)
     // Otherwise call DoChangeSingleSelection so GetOldSelection() will return
     // the correct value if row < 0 later.
     const int count = static_cast<int>(GetCount());
-    if ( row < 0 || row > count )
+    if ( row < 0 || row >= count )
     {
         if ( !m_oldSelections.empty() )
         {