curses: interactively toggling 'perm_invent' On

Enabling perm_invent with 'O' ('m O' these days) with curses used to
work but stopped at some point.  Analysis by entrez has attributed
the change to the g.program_state.in_docrt flag in docrt().  When
curses creates the perm_invent window for update_inventory(), it
calls docrt() to have nethack redraw the screen.

 docrt() -> update_inventory() -> curses_update_inventory() -> ...
  -> curs_reset_windows() -> doredraw() -> docrt() [early return]

resulted in room for the persistent inventory window but it was
blank.

This also replaces a couple of doredraw() calls with direct calls to
docrt() (one in code that isn't used).  doredraw() implements a user
command; docrt() does the actual redrawing.

src/options.c

@@ -8126,7 +8126,8 @@ doset(void) /* changing options via menu by Per Liboriussen */
                     Sprintf(buf, fmtstr_doset_tab,
                             name, *bool_p ? "true" : "false");
                 if (pass == 0)
-                    enhance_menu_text(buf, sizeof buf, pass, bool_p, &allopt[i]);
+                    enhance_menu_text(buf, sizeof buf, pass, bool_p,
+                                      &allopt[i]);
                 add_menu(tmpwin, &nul_glyphinfo, &any, 0, 0,
                          ATR_NONE, clr, buf, MENU_ITEMFLAGS_NONE);
             }
@@ -8266,6 +8267,20 @@ doset(void) /* changing options via menu by Per Liboriussen */
         check_gold_symbol();
         reglyph_darkroom();
         docrt();
+        /*
+         * docrt() calls update_inventory() but
+         * (*windowprocs.win_update_inventory)(0) for curses ends up
+         * calling back to docrt() after creating its perm_invent
+         * window.  That call back has become a no-op because of the
+         * program_state.in_docrt flag.  So call update_inventory()
+         * explicitly in case perm_invent was toggled.  It's only
+         * needed if perm_invent was off and is now on but won't kill
+         * anybody if done when not necessary.
+         * Note:  doset_simple() doesn't need this because it doesn't
+         * offer a chance to toggle perm_invent.
+         */
+        if (iflags.perm_invent)
+            update_inventory();
     }
     if (g.context.botl || g.context.botlx) {
         bot();

win/curses/cursmain.c

@@ -1103,7 +1103,7 @@ curs_reset_windows(boolean redo_main, boolean redo_status)
     }
     if (need_redraw) {
         curses_last_messages();
-        doredraw();
+        docrt();
     }
 }
 

win/curses/cursstat.c

@@ -1784,7 +1784,7 @@ curses_update_stats(void)
         if (cy != ay) {
             curses_create_main_windows();
             curses_last_messages();
-            doredraw();
+            docrt();
 
             /* Reset XP highlight (since classic_status and new show
                different numbers) */