Widely used frame validity and checking functions.

Widely used frame validity and checking functions.
* frame.h (decode_live_frame, decode_any_frame): Add prototypes.
* frame.c (decode_live_frame, decode_any_frame): New functions.
(delete_frame, Fredirect_frame_focus, Fframe_parameters)
(Fframe_parameter, Fframe_char_height, Fframe_char_width)
(Fframe_pixel_height, Fframe_pixel_width, Ftool_bar_pixel_width)
(Fframe_pointer_visible_p): Use decode_any_frame.
(Fmake_frame_visible, Fmake_frame_invisible, Ficonify_frame)
(Fraise_frame, Flower_frame, Fmodify_frame_parameters)
(Fset_frame_height, Fset_frame_width): Use decode_live_frame.
(Fframe_focus): Likewise.  Allow zero number of arguments.
Adjust docstring.
(frame_buffer_list, frame_buffer_predicate): Remove.
* lisp.h (frame_buffer_predicate): Remove prototype.
* buffer.c (Fother_buffer): Use decode_any_frame.
* xdisp.c (Ftool_bar_lines_needed): Likewise.
* xfaces.c (Fcolor_gray_p, Fcolor_supported_p): Likewise.
* font.c (Ffont_face_attributes, Ffont_family_list, Fopen_font)
(Fclose_font, Ffont_info): Use decode_live_frame.
* fontset.c (check_fontset_name): Likewise.
* terminal.c (Fframe_terminal): Likewise.
* w32fns.c (check_x_frame): Likewise.
* window.c (Fminibuffer_window, Fwindow_at)
(Fcurrent_window_configuration): Likewise.
(Frun_window_configuration_change_hook, Fwindow_resize_apply):
Likewise.  Allow zero number of arguments.  Adjust docstring.
* dispnew.c (Fredraw_frame): Likewise.
* xfaces.c (frame_or_selected_frame): Remove.
(Fx_list_fonts, Finternal_get_lisp_face_attribute, Fface_font)
(Finternal_lisp_face_equal_p, Finternal_lisp_face_empty_p)
(Fframe_face_alist): Use decode_live_frame.
* xfns.c (check_x_frame): Likewise.