The file dialog needs to be able to read images (mostly PNG).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@25806 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/dialogs/dialogs.cpp

@@ -123,6 +123,8 @@ MyCanvas *myCanvas = (MyCanvas *) NULL;
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit()
 {
+    wxInitAllImageHandlers();
+
 #if defined(__WXGTK__) && defined(wxUSE_UNICODE)
   wxConvCurrent = &wxConvLibc;
 #endif