* window.c (coordinates_in_window): Do not assume that all
one-line windows are the minibuffer, or that all minibuffers are
one line high. Use MINI_WINDOW_P.
* window.c (change_window_height): If the size of the window will
shrink below the minimum, this code would only try to delete it if
it had a parent. Well, even if the window doesn't have a parent,
you want Fdelete_window to signal an error, since you're trying to
resize one of the undeleteable windows into nothingness. So call
Fdelete_window even if the window doesn't have a parent.
* window.c (MINSIZE): Add kludge so that the minibuffer is always
allowed to shrink to one line in height.
(MINSIZE, CURBEG, CURSIZE): Change these so that their argument
are always Lisp_Objects, not struct window *'s.
(change_window_height): Changed accordingly.