PR python/12533:

	* value.h (release_value_or_incref): Declare.
	* value.c (struct value) <released>: New field.
	(free_all_values, release_value, value_release_to_mark): Update
	'released'.
	(release_value_or_incref): New function.
	* python/py-value.c (valpy_new): Use release_value_or_incref.
	(value_to_value_object): Likewise.
	* varobj.c (install_new_value): Move value_incref earlier.