Add test for a custom cursor to the image sample.

Load a cursor from PNG file to check that it appears as expected.

See #11989.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65073 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/image/image.cpp

@@ -678,6 +678,7 @@ MyFrame::MyFrame()
 
     // 500 width * 2750 height
     m_canvas->SetScrollbars( 10, 10, 50, 275 );
+    m_canvas->SetCursor(wxImage("cursor.png"));
 }
 
 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )