Problem: did not destroy old chunk before receiving new one
Problem: did not destroy old chunk before receiving new one

Caused memory leak in selftest, affected chunk and uuid types.

Solution: correctly destroy any old structures before creating new
ones in the recv method.

vyskocilm/zproto,c-rack/zproto,jemc/zproto,somdoron/zproto,jemc/zproto,c-rack/zproto,sappo/zproto,jemc/zproto,somdoron/zproto,sphaero/zproto,sphaero/zproto,sphaero/zproto,vyskocilm/zproto,jdiez17/zproto,sphaero/zproto,asokoloski/zproto,bkmit/zproto,vyskocilm/zproto,jdiez17/zproto,sappo/zproto,bkmit/zproto,vyskocilm/zproto,jdiez17/zproto,hintjens/zproto,zeromq/zproto,c-rack/zproto,jdiez17/zproto,bkmit/zproto,asokoloski/zproto,somdoron/zproto,somdoron/zproto,hintjens/zproto,zeromq/zproto,bkmit/zproto,jdiez17/zproto,c-rack/zproto,sappo/zproto,sappo/zproto,asokoloski/zproto,vyskocilm/zproto,hintjens/zproto,bkmit/zproto,jemc/zproto,zeromq/zproto,vyskocilm/zproto,c-rack/zproto,asokoloski/zproto,asokoloski/zproto,somdoron/zproto,zeromq/zproto,hintjens/zproto,asokoloski/zproto,jemc/zproto,hintjens/zproto,hintjens/zproto,zeromq/zproto,vyskocilm/zproto,zeromq/zproto,sphaero/zproto,c-rack/zproto,jdiez17/zproto,jdiez17/zproto,jemc/zproto,sappo/zproto,sappo/zproto,bkmit/zproto,bkmit/zproto,c-rack/zproto,zeromq/zproto,sphaero/zproto,hintjens/zproto,somdoron/zproto,sappo/zproto,asokoloski/zproto,somdoron/zproto,jemc/zproto