Revert "restore.c globals moved to instance_globals."

This reverts commit 865c4d5a7d.

win/tty/wintty.c

@@ -3171,6 +3171,7 @@ void
 tty_cliparound(x, y)
 int x, y;
 {
+    extern boolean restoring;
     int oldx = clipx, oldy = clipy;
 
     if (!clipping)
@@ -3190,7 +3191,7 @@ int x, y;
         clipy = clipymax - (LI - 3);
     }
     if (clipx != oldx || clipy != oldy) {
-        if (on_level(&u.uz0, &u.uz) && !g.restoring)
+        if (on_level(&u.uz0, &u.uz) && !restoring)
             (void) doredraw();
     }
 }