win32gui temporary build fix (from <Someone>)

> The trunk did not compile when STATUS_VIA_WINDOWPORT was set. > This patch fixes that (for the time being).

win/win32/mhmain.c

@@ -17,6 +17,8 @@ typedef struct mswin_nethack_main_window {
 	int mapAcsiiModeSave;
 } NHMainWindow, *PNHMainWindow;
 
+extern winid WIN_STATUS;
+
 static TCHAR szMainWindowClass[] = TEXT("MSNHMainWndClass");
 static TCHAR szTitle[MAX_LOADSTRING];
 extern void mswin_display_splash_window(BOOL);

win/win32/mswproc.c

@@ -28,6 +28,7 @@
 #define LLEN 128
 
 extern const char *killed_by_prefix[];
+extern winid WIN_STATUS;
 
 #ifdef _DEBUG
 extern void logDebug(const char *fmt, ...);