Revert "Change Windows startup"

This reverts commit acb85b18cf.

Some optlist issues arose on some platforms, but not all.
I need to investigate the cause of those.

src/decl.c

@@ -592,7 +592,7 @@ static const struct instance_globals_o g_init_o = {
     /* o_init.c */
     DUMMY, /* oclass_prob_totals */
     /* options.c */
-    phase_not_set, /* opt_phase */
+    0, /* opt_phase */
     FALSE, /* opt_initial */
     FALSE, /* opt_from_file */
     FALSE, /* opt_need_redraw */