Command repeating by using cmd queues

This replaces the old pushq/saveq arrays (which were used to save
the keys pressed by the user for repeating a previous command)
with a new command queue.  This means there's no hard-coded limit
to the saved keys, and it can repeat extended commands which are
not bound to any key.

win/Qt/qt_map.cpp

@@ -530,7 +530,7 @@ void NetHackQtMapViewport::Display(bool block)
     change.clear();
 
     if (block) {
-	yn_function("Press a key when done viewing", NULL, '\0');
+	yn_function("Press a key when done viewing", NULL, '\0', TRUE);
     }
 }
 

win/Qt/qt_xcmd.cpp

@@ -583,12 +583,6 @@ int NetHackQtExtCmdRequestor::get()
 	exec();
 
     int ret = result() - 1;
-    if (!::g.in_doagain) {
-        if (ret >= 0)
-            savech_extcmd(::extcmdlist[ret].ef_txt, FALSE);
-        else
-            savech(0);
-    }
     return ret;
 }
 

win/X11/winmisc.c

@@ -1557,12 +1557,8 @@ X11_get_ext_cmd(void)
     (void) x_event(EXIT_ON_EXIT);
 
     if (extended_cmd_selected < 0) {
-        if (!g.in_doagain)
-            savech(0);
         return -1;
     }
-    if (!g.in_doagain)
-        savech_extcmd(command_list[extended_cmd_selected], TRUE);
     return command_indx[extended_cmd_selected];
 }
 

win/curses/cursdial.c

@@ -496,20 +496,12 @@ curses_ext_cmd(void)
         curses_destroy_win(extwin2);
 
     if (ret != -1) {
-        if (!g.in_doagain)
-            savech_extcmd(cur_choice, TRUE);
     } else {
         char extcmd_char = extcmd_initiator();
 
         if (*cur_choice)
             pline("%s%s: unknown extended command.",
                   visctrl(extcmd_char), cur_choice);
-
-        if (!g.in_doagain) {
-            savech(0); /* reset do-again buffer */
-            if (letter != '\033')
-                savech(extcmd_char);
-        }
     }
     return ret;
 }

win/tty/getline.c

@@ -296,12 +296,9 @@ tty_get_ext_cmd(void)
         if (nmatches != -1)
             pline("%s%.60s: unknown extended command.",
                   visctrl(extcmd_char[0]), buf);
-        savech(0); /* reset do-again buffer */
-        savech(extcmd_char[0]);
         return -1;
     }
 
-    savech_extcmd(buf, TRUE); /* savech() for extcmd_char+buf[...]+'\n' */
     return ecmatches[0];
 }
 

win/win32/mswproc.c

@@ -1848,12 +1848,6 @@ mswin_get_ext_cmd(void)
             ret = -1;
     }
 
-    if (!g.in_doagain) {
-        if (ret >= 0)
-            savech_extcmd(cmd, TRUE);
-        else
-            savech(0);
-    }
     return ret;
 }