Keep wxPalmOS buildable - missing functions.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40789 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/palmos/utils.cpp

@@ -197,6 +197,11 @@ void wxBell()
     SndPlaySystemSound(sndWarning);
 }
 
+bool wxIsPlatform64Bit()
+{
+    return false;
+}
+
 wxString wxGetOsDescription()
 {
     wxString strOS = _T("PalmOS");