Do not use global Lisp_Object in composition macros.

Do not use global Lisp_Object in composition macros.
* composite.h (composition_temp): Remove declaration.
(COMPOSITION_METHOD, COMPOSITION_VALID_P): Replace with...
(composition_method, composition_valid_p): ...inline functions.
* composite.c (composition_temp): Remove.
(run_composition_function, update_compositions)
(composition_compute_stop_pos, composition_adjust_point)
(Ffind_composition_internal):
* coding.c (handle_composition_annotation):
* xdisp.c (handle_composition_prop, check_point_in_composition):
Related users changed.