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Memory could be leaked if a second prompt or message appeared while another was
still present, so add a separate prompt free callback and make the _clear function responsible for calling it if necessary (rather than the individual prompt callbacks). Also make both messages and prompts clear any existing when a new is set. In addition, the screen could be modified while the prompt is there, restore the redraw-entire-screen behaviour on prompt clear; add a comment as a reminder.
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@ -55,7 +55,7 @@ cmd_select_prompt_exec(struct cmd *self, struct cmd_ctx *ctx)
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if (c->prompt_string != NULL)
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return (0);
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status_prompt_set(c, "index ", cmd_select_prompt_callback, c, 0);
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status_prompt_set(c, "index ", cmd_select_prompt_callback, NULL, c, 0);
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return (0);
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}
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