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Eliminate HIGHPRI as compilation option.
(emacs_priority): New C variable, also Lisp variable.
(main): Set the priority iff emacs_priority is nonzero.

	members of size_hints, if they're available (X11R4 and after);
	otherwise, approximate the right thing, by using min_width and
	min_height as the base size.

	* xterm.c (x_catch_errors): Don't forget to initialize
	x_caught_error_message to the null string, so x_check_errors can
	tell when an error has occurred.

	insists on defining SIGCHLD, even if it already has a definition.
	(file_p): Use the constant 4 instead of R_OK; empirically, the
	number is more portable than the symbol if you count the #include
	hair you have to go through to get R_OK defined.  Ffile_readable_p
	does this too.

	* xrdb.c (getuid): Declare this to return short.

	minibuffer frames, don't name the frame after the in the selected
	window.  We can use Fnext_frame to do this test easily.

	if specified, return the minibuffer used by that frame.

	* window.c (Fset_window_configuration): Don't signal an error
	if the frame size saved in the window configuration doesn't
	match the frame's current size; instead, temporarily resize
	the frame while installing the window configuration.  This is
	important because using the minibuffer saves and restores the
	current window configuration, and you don't want to signal an
	error just because the user resized the frame while using the
	minibuffer.

	the file and at the function definition.