fix windows bugs H4030 and H4045 (123 and 138)

Changes to be committed:
	modified:   sys/share/pcmain.c
	modified:   sys/winnt/nttty.c
	modified:   sys/winnt/stubs.c

Bug 123 Report 4030:
Minor thing I've noticed - if I quit the game, at the "Hit <Enter> to end."
prompt, if I close the window rather than pressing Enter, I get the following:

Bug 138  - #H4045:
 "nethack -s" leads to "-s is not supported for the Graphical Interface".
 That's wrong.
 (The Graphical Interface comes with "nethackw".)

sys/winnt/stubs.c

@@ -7,6 +7,7 @@
 
 int GUILaunched;
 struct window_procs mswin_procs = { "guistubs" };
+
 void
 mswin_destroy_reg()
 {
@@ -36,6 +37,7 @@ char *argv[];
     return 0;
 }
 #endif
+
 #endif /* GUISTUB */
 
 /* =============================================== */
@@ -43,7 +45,10 @@ char *argv[];
 #ifdef TTYSTUB
 
 #include "hack.h"
+#include "win32api.h"
 
+HANDLE hConIn;
+HANDLE hConOut;
 int GUILaunched;
 struct window_procs tty_procs = { "ttystubs" };