Patch: suppress duplicate Fl_Printer::class_id

Hello All,

Building commit 317f010 (two days ago) of dillo, I got a duplicate
symbol on OSX 10.6.8 with gcc 4.2.1.  Here is the diff that suppresses
it.

----------------
$ hg diff
diff -r c09473fb7311 dw/fltkplatform.cc
--- a/dw/fltkplatform.cc	Sat Sep 13 09:46:28 2014 +0000
+++ b/dw/fltkplatform.cc	Sat Sep 13 23:49:26 2014 +1200
@@ -37,10 +37,10 @@
  * any need for currently. This stub prevents that. */
 class FL_EXPORT Fl_Printer : public Fl_Paged_Device {
 public:
-   static const char *class_id;
+//   static const char *class_id;
    Fl_Printer(void) {};
 };
-const char *Fl_Printer::class_id = "Fl_Printer";
+//const char *Fl_Printer::class_id = "Fl_Printer";

 /* Tooltips */
 static Fl_Menu_Window *tt_window = NULL;
---------------

I have no idea what it will turn out that I've broken.

If having this as a pull request will help, then I will try to work out how.

Regards,
James.