Merged to flounder under gerrit Change  19535.

Fix was merged to master under gerrit Change 19483.

Cherry-picked to flounder under gerrit  Change 19535, waiting for cdoe review.

I found a random segfault on agl-service-nfc caused by memory corruption originated in libneardal. 

On record memory release,  a memset operation was done on the freed memory, providing a chance for corruption if the memory was claimed by other process before the memset.

I have reproduced the issue by reading tags back to back. It  happens after reading a number of times, usually over 10+ cycles, although it varies and it can take longer (20, 30 or even 50+) to reproduce.

I can reproduce at will now, and I'm investigating it.

I havent been able to reproduce this issue usign empty NTAG213.