As per the docs, the value returned is -1 if the value entered is out of range [patch 1116606]

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31773 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/numdlgg.cpp

@@ -169,6 +169,7 @@ void wxNumberEntryDialog::OnOK(wxCommandEvent& WXUNUSED(event))
     if ( m_value < m_min || m_value > m_max )
     {
         // not a number or out of range
+        m_value = -1;
         EndModal(wxID_CANCEL);
     }