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.

include/wintype.h

@@ -205,6 +205,7 @@ enum to_core_flags {
     too_small        = 0x002,
     prohibited       = 0x004,
     no_init_done     = 0x008,
+    too_early        = 0x010,
 };
 
 enum from_core_requests {