fix deleting a frozen multi-line wxTextCtrl, see #13543

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72551 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/textctrl.cpp

@@ -613,6 +613,11 @@ void wxTextCtrl::Init()
 
 wxTextCtrl::~wxTextCtrl()
 {
+    // this is also done by wxWindowGTK dtor, but has to be done here so our
+    // DoThaw() override is called
+    while (IsFrozen())
+        Thaw();
+
     if (m_anonymousMarkList)
         g_slist_free(m_anonymousMarkList);
 }