2010-03-12 Ivan Maidanski <ivmai@mail.ru>

2010-03-12  Ivan Maidanski <ivmai@mail.ru>

	* alloc.c (GC_start_call_back): Replace the definition type to
	GC_start_callback_proc.
	* alloc.c (GC_set_start_callback, GC_get_start_callback): New
	setter/getter function.
	* alloc.c (GC_try_to_collect_inner): Call GC_notify_full_gc()
	unconditionally (because GC_try_to_collect_inner always does full
	GC).
	* include/gc_mark.h (GC_start_callback_proc): New type.
	* include/gc_mark.h (GC_set_start_callback,
	GC_get_start_callback): New API function declaration.