resource-directory: Fix uninitialised value

resource-directory: Fix uninitialised value

resource-directory: Fix condition on uninitialised value

Issue was observed using valgrind on GNU/Linux:

https://build.iotivity.org/ci/job/iotivity-verify-unit_tests/16067/valgrindResult/pid=13739,0x2/

Bug: https://jira.iotivity.org/browse/IOT-2279
Change-Id: Ide0a2cca989466fefd4a13b41cc81bf38fa8afff
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20829
Reviewed-by: Habib Virji <habib.virji@samsung.com>
(cherry picked from commit bb85bde7d79e49580fe0c90dbcf0746f585c0ad4)
Reviewed-on: https://gerrit.iotivity.org/gerrit/21387
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>