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/extern.h

@@ -2262,6 +2262,9 @@ extern int msgtype_type(const char *, boolean) NONNULLARG1;
 extern void hide_unhide_msgtypes(boolean, int);
 extern void msgtype_free(void);
 extern void options_free_window_colors(void);
+#ifdef TTY_PERM_INVENT
+extern void check_perm_invent_again(void);
+#endif
 
 /* ### pager.c ### */
 

include/flag.h

@@ -319,6 +319,7 @@ struct instance_flags {
     boolean news;             /* print news */
     boolean num_pad;          /* use numbers for movement commands */
     boolean perm_invent;      /* display persistent inventory window */
+    boolean perm_invent_pending;  /* need to try again */
     boolean renameallowed;    /* can change hero name during role selection */
     boolean renameinprogress; /* we are changing hero name */
     boolean sounds;           /* master on/off switch for using soundlib */

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 {