Fixed minor leak of decrement reference count
Fixed minor leak of decrement reference count

aerospike/aerospike-client-python,arthurprs/aerospike-client-python,aerospike/aerospike-client-python,arthurprs/aerospike-client-python,trupty/aerospike-client-python,trupty/aerospike-client-python,arthurprs/aerospike-client-python,aerospike/aerospike-client-python,trupty/aerospike-client-python