Fixed issues that are warnings on Linux, but errors on Arduino.

Fixed issues that are warnings on Linux, but errors on Arduino.

Change-Id: Ibbc1d31e64e5aad711dc576c517c7665f622f40f
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/453
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Sudarshan Prasad <sudarshan.prasad@intel.com>
Reviewed-by: Doug Hudson <douglas.hudson@intel.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
Reviewed-by: Erich Keane <erich.keane@intel.com>