Restoring a game can return to the wishing prompt

In TTY or curses, if the terminal goes away while you're in the wishing
prompt, return to the prompt when the game is restored.

Breaks saves.

win/curses/cursdial.c

@@ -308,6 +308,7 @@ curses_character_input_dialog(
         answer = curses_read_char();
 #endif
         if (answer == ERR) {
+            iflags.term_gone = 1;
             answer = def;
             break;
         }
@@ -451,6 +452,8 @@ curses_ext_cmd(void)
         curs_set(0);
         prompt_width = (int) strlen(cur_choice);
 
+        if (letter == ERR)
+            iflags.term_gone = 1;
         if (letter == '\033' || letter == ERR) {
             ret = -1;
             break;
@@ -1518,6 +1521,7 @@ menu_get_selections(WINDOW *win, nhmenu *menu, int how)
         curletter = curses_getch();
 
         if (curletter == ERR) {
+            iflags.term_gone = 1;
             num_selected = -1;
             dismiss = TRUE;
         }

win/curses/cursmesg.c

@@ -348,6 +348,8 @@ curses_block(
             ret = '\n';
         else
             ret = curses_read_char();
+        if (ret == ERR)
+            iflags.term_gone = 1;
         if (ret == ERR || ret == '\0')
             ret = '\n';
         /* msgtype=stop should require space/enter rather than any key,
@@ -775,6 +777,7 @@ curses_message_win_getline(const char *prompt, char *answer, int buffer)
 
         switch (ch) {
         case ERR: /* should not happen */
+            iflags.term_gone = 1;
             *answer = '\0';
             goto alldone;
         case '\033': /* DOESCAPE */

win/curses/cursmisc.c

@@ -1026,6 +1026,7 @@ parse_escape_sequence(int key, boolean *keypadnum)
             ret = getch();
 
         if (ret == ERR) {
+            iflags.term_gone = 1;
             /* there was no additional char; treat as M-O or M-^O below */
             ret = (key == '\033') ? 'O' : C('O');
         } else if (ret >= 112 && ret <= 121) { /* 'p'..'y' */