Revert "Modified objects initialization to support re-entry."

This reverts commit c3eefefc99.

sys/share/pcmain.c

@@ -97,6 +97,7 @@ char *argv[];
 
     nethack_enter(argc, argv);
 
+    instance_globals_init();
     sys_early_init();
 
 #if defined(WIN32) && defined(TTY_GRAPHICS)

sys/winnt/stubs.c

@@ -37,7 +37,8 @@ char *argv[];
 {
     boolean resuming;
 
-    early_init();
+    icontext_init();
+    sys_early_init();
     Strcpy(default_window_sys, "tty");
     resuming = pcmain(argc, argv);
     moveloop(resuming);