* macterm.h (cfstring_create_with_utf8_cstring): Added prototype.

* macterm.h (cfstring_create_with_utf8_cstring): Added prototype.
* image.c (image_load_quartz2d): Use
cfstring_create_with_utf8_cstring
* macmenu.c (add_menu_item): Use
cfstring_create_with_utf8_cstring
* macfns.c (x_set_name, x_set_title): Use
cfstring_create_with_utf8_cstring
(Fx_file_dialog): Use cfstring_create_with_utf8_cstring and use
constant CFRefs instead of creating them each time for labels.
* mac.c (cfstring_create_with_utf8_cstring): Added to prevent
crashes with invalid characters.