fix reported crash of TTY_PERM_INVENT segfaulting

Options processing can be early, even before ttyDisplay is allocated.
If we find that TTY_PERM_INVENT initialization is happening too early,
just set a marker (iflags.perm_invent_pending) to try again a bit later.

The changes in win/share are just to be able to sucessfully
reproduce the original issue on Windows. It was easily reproduced
on Unix, just by building with TTY_PERM_INVENT in include/config.h
and setting OPTIONS=perm_invent in config file.

src/allmain.c

@@ -720,6 +720,10 @@ init_sound_disp_gamewindows(void)
     display_nhwindow(WIN_MESSAGE, FALSE);
     clear_glyph_buffer();
     display_nhwindow(WIN_MAP, FALSE);
+#ifdef TTY_PERM_INVENT
+    if (iflags.perm_invent_pending)
+        check_perm_invent_again();
+#endif
  }
 
 void