win32tty: startup msg cleanup

the win32 cursor restriction stuff messed up any
messages displayed during abnormal start conditions
where the window system never got initialized properly.
among them:
- messages relating to lock files or games in progress
- dungeon errors
- early panic messages

win/tty/wintty.c

@@ -791,8 +791,11 @@ tty_exit_nhwindows(str)
 #endif
 	    wins[i] = 0;
 	}
-#ifndef NO_TERMS	/*(until this gets added to the window interface)*/
+#ifndef NO_TERMS		/*(until this gets added to the window interface)*/
     tty_shutdown();		/* cleanup termcap/terminfo/whatever */
+#endif
+#ifdef WIN32CON
+    nttty_close();
 #endif
     iflags.window_inited = 0;
 }