Fix infloop of -nw session at exit on MS-Windows under a debugger.

src/sysdep.c (reset_sys_modes): Use cursorX, not curX, as the latter
 contains garbage on WINDOWSNT (which could potentially infloop at
 exit).

src/ChangeLog

@@ -1,5 +1,9 @@
 2014-06-04  Eli Zaretskii  <eliz@gnu.org>
 
+	* sysdep.c (reset_sys_modes): Use cursorX, not curX, as the latter
+	contains garbage on WINDOWSNT (which could potentially infloop at
+	exit).
+
 	Minimize cursor motion during TTY menu updates.
 	* term.c (tty_menu_display): Don't position cursor here.  Instead,
 	pass the cursor coordinates to update_frame_with_menu.

src/sysdep.c

@@ -1245,7 +1245,7 @@ reset_sys_modes (struct tty_display_info *tty_out)
       int i;
       tty_turn_off_insert (tty_out);
 
-      for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++)
+      for (i = cursorX (tty_out); i < FrameCols (tty_out) - 1; i++)
         {
           fputc (' ', tty_out->output);
         }