(format_mode_line_unwind_data): New arg SAVE_PROPTRANS
controls whether to save and restore mode_line_proptrans_alist.
Callers changed.
(unwind_format_mode_line): Work with that feature.
(redisplay_internal): Don't call prepare_menu_bars if memory full.
(move_elt_to_front): New function.
(display_mode_element): Use move_elt_to_front.
Don't bother munging text props on a null string.
Delete obsolete elts from mode_line_proptrans_alist.
(decode_mode_spec): Test Vmemory_full, not spare_memory.
(Fmemory_full_p): Function deleted.
(syms_of_alloc): Don't defsubr it.
(memory_full_cons_threshold): New variable.
(spare_memory): Now a vector of 7 elts.
(buffer_memory_full): Don't set Vmemory_full here.
(xfree): Don't try to refill here.
(emacs_blocked_free): Record BYTES_USED in local var.
(memory_full): Now free all the slots in spare_memory.
(refill_memory_reserve): Allocate each slot in spare_memory.
(init_alloc_once): Call refill_memory_reserve.
(note_mouse_movement): Say mouse moved if current frame differs
from last_mouse_glyph_frame, and update last_mouse_glyph_frame.
(XTmouse_position): Set last_mouse_glyph_frame.
(XTread_socket): Clear last_mouse_glyph_frame on mouse up/down event.
(mac_draw_string_common) [MAC_OSX && WORDS_BIG_ENDIAN]: Fix typo.
Use EndianU16_BtoN.
(mac_draw_string_common) [MAC_OSX]: Don't use ATSUClearLayoutControls.
(x_per_char_metric, XLoadQueryFont)
[MAC_OS_X_VERSION_MAX_ALLOWED < 1020]: Use device origins to get
glyph bounds.
(mac_to_x_fontname, mac_do_list_fonts)
(mac_initialize_display_info): Change screen resolutions to 72dpi.
(last_mouse_glyph_frame): New var.
(note_mouse_movement): Say mouse moved if current frame differs
from last_mouse_glyph_frame, and update last_mouse_glyph_frame.
(XTmouse_position): Set last_mouse_glyph_frame.
(handle_one_xevent): Clear last_mouse_glyph_frame [instead of
last_mouse_glyph] on mouse up/down event.
Gcpro FOUND as well as FILE, but not EFOUND.
Unless preloading, record FOUND instead of FILE in Vload_history.
Rename repeat local FILE to MSG_FILE.
(syms_of_lread) <load-history>: Doc fix.
