Fixed memory leaks in generated code
Fixed memory leaks in generated code

objc_primitive_field.cc generates code that leaks
copied objects. See https://github.com/booyah/protobuf-objc/issues/6

alexeyxo/protobuf-objc,alexeyxo/protobuf-objc,E-B-Smith/protobuf-objc,E-B-Smith/protobuf-objc,E-B-Smith/protobuf-objc,alexeyxo/protobuf-objc,alexeyxo/protobuf-objc,E-B-Smith/protobuf-objc