Converts a pointer to a #gint to a hash value.
It can be passed to
g_hash_table_new() as the
when using non-
NULL pointers to integer values as keys in a
Note that this function acts on pointers to #gint, not on #gint
directly: if your hash table’s keys are of the form
GINT_TO_POINTER (n), use
A pointer to a #gint key.
|The data is owned by the caller of the function.|