Merge branch 'scanbuild_fixes'

changes/bug8793

src/common/address.c

src/common/compat.c

src/common/memarea.c

src/ext/ht.h

src/ext/tinytest.c

src/or/buffers.c

src/or/circuitbuild.c

src/or/circuitlist.c

src/or/circuitmux.c

src/or/circuituse.c

src/or/connection.c

src/or/cpuworker.c

src/or/ext_orport.c

src/or/onion.c

src/or/rendservice.c

src/test/test_addr.c

src/test/test_oom.c

src/test/test_policy.c

src/tools/tor-gencert.c