NetHackW: fix rendering of animations

Animations render by changing map state and calling delay.  When we delay,
we must ensure map windoow has been updated to show latest state before
we delay.

win/win32/mswproc.c

@@ -1852,6 +1852,7 @@ void
 mswin_delay_output()
 {
     logDebug("mswin_delay_output()\n");
+    mswin_map_update(mswin_hwnd_from_winid(WIN_MAP));
     Sleep(50);
 }