convert az_ulib_flush_callback from void to az_result

Azure / azure-ulib-c

THIS REPO IS CURRENTLY IN PREVIEW. THE APIs ARE NOT FINAL AND ARE SUBJECT TO CHANGE WITHOUT NOTICE. Azure utility library used in embedded and constrained devices.

MIT License

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convert az_ulib_flush_callback from void to az_result #82

Closed smcd253 closed 3 years ago

smcd253 commented 3 years ago

convert az_ulib_flush_callback from void to az_result so the flush operation can handle any errors that occur in the callback