Compares the two int values being pointed to and returns true if they are equal.
It can be passed to
g_hash_table_new as the
key_equal_func parameter, when using non-null
pointers to integers as keys in a GenericSet.
Note that this function acts on pointers to int, not on int directly: if your hash table's keys are of the form `GINT_TO_POINTER (n)`, use direct_equal instead.
a pointer to a int key
a pointer to a int key to compare with
true if the two keys match.