Fix possible resource leak (src/bin/pg_basebackup/pg_receivewal.c)

[Ranier Vilela]

Hi.

Per Coverity.

CID 1591288: (#1 of 1): Resource leak (RESOURCE_LEAK)
10. leaked_storage: Variable sysidentifier going out of scope leaks the
storage it points to.

Trivial patch attached.

best regards,
Ranier Vilela

fix-resource-leak-pg_receivewal.patch
Description: Binary data