if prompts are inserted into mini-buffer.
XSETWINDOW (window, w);
+#if NO_PROMPT_IN_BUFFER
/* The omission of the clause
&& marker_position (w->start) == BEG
here is deliberate; I think we want to measure from the prompt
start_hpos = minibuf_prompt_width;
}
+#endif /* NO_PROMPT_IN_BUFFER */
/* If the window contains this buffer, use it for getting text properties.
Otherwise use the current buffer as arg for doing that. */