[riot-notifications] [RIOT-OS/RIOT] gnrs/pktbuf: avoid memcpy if size <= 0 (#10786)

Kaspar Schleiser notifications at github.com
Wed Jan 16 15:57:51 CET 2019

> The `data != NULL` check is still required for the case that `(size > 0) && (data != NULL)` (which is a legal input for uninitialized regions). Without that check the unittests segfault:

Totally right. How about now?

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