Fixes a memory leak in ion_writer_open_stream() (#262)
Fixes a memory leak in ion_writer_open_stream() (#262)


amzn/ion-c,amznlabs/ion-c,amznlabs/ion-c,amznlabs/ion-c,amzn/ion-c,amznlabs/ion-c,amzn/ion-c,amzn/ion-c