Patrick Venture 8b6d127bb1 helper: add free_n method to handle clearing pointers
free_n() will free the memory and clear the pointer, which will reduce
the probability a developer will forget to clear the pointer after
freeing.

Resolves: #79

Signed-off-by: Patrick Venture <venture@google.com>
2018-12-24 19:17:48 +03:00
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