Resolve unit-test issues

[sspans]

No description provided.

[sharewax]

no warnings, but 2 tests are failed.

make[1]: Entering directory '/builddir/build/BUILD/ladvd-1.1.2/tests'
make  check_compat check_proto check_util check_tlv check_parent check_child check_cli libcheckwrap.la
make[2]: Entering directory '/builddir/build/BUILD/ladvd-1.1.2/tests'
  CC       check_compat.o
  CC       check_wrap.lo
  CCLD     libcheckwrap.la
  CCLD     check_compat
  CC       check_proto.o
  CCLD     check_proto
  CC       check_util.o
  CCLD     check_util
  CC       check_tlv.o
  CCLD     check_tlv
  CC       check_parent.o
  CCLD     check_parent
  CC       check_child.o
  CCLD     check_child
  CC       check_cli.o
  CCLD     check_cli
make[2]: 'libcheckwrap.la' is up to date.
make[2]: Leaving directory '/builddir/build/BUILD/ladvd-1.1.2/tests'
make  check-TESTS
make[2]: Entering directory '/builddir/build/BUILD/ladvd-1.1.2/tests'
make[3]: Entering directory '/builddir/build/BUILD/ladvd-1.1.2/tests'
PASS: check_compat
PASS: check_proto
FAIL: check_util
PASS: check_tlv
PASS: check_parent
FAIL: check_child
PASS: check_cli
============================================================================
Testsuite summary for ladvd 1.1.2
============================================================================
# TOTAL: 7
# PASS:  5
# SKIP:  0
# XFAIL: 0
# FAIL:  2
# XPASS: 0
# ERROR: 0
============================================================================
See tests/test-suite.log
Please report to sten@blinkenlights.nl