From db29d5efba021363e7f638b2e366b103d535ba92 Mon Sep 17 00:00:00 2001
From: Paul Cornett <paulcor@users.noreply.github.com>
Date: Sun, 1 Oct 2017 09:11:45 -0700
Subject: [PATCH] Fix incorrect pointer indirection in sort callback function

---
 samples/propgrid/tests.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/samples/propgrid/tests.cpp b/samples/propgrid/tests.cpp
index af1d93c5df..3a48785286 100644
--- a/samples/propgrid/tests.cpp
+++ b/samples/propgrid/tests.cpp
@@ -285,10 +285,11 @@ inline bool GetRandomBooleanVal()
     return (rand() % 2) != 0;
 }
 
+extern "C"
 int gpiro_cmpfunc(const void* a, const void* b)
 {
-    const wxPGProperty* p1 = (const wxPGProperty*) a;
-    const wxPGProperty* p2 = (const wxPGProperty*) b;
+    const wxPGProperty* p1 = *static_cast<wxPGProperty* const*>(a);
+    const wxPGProperty* p2 = *static_cast<wxPGProperty* const*>(b);
     return (int) (((size_t)p1->GetClientData()) - ((size_t)p2->GetClientData()));
 }