GitLab

Add null checking for a resource object which could be NULL if server
receives a request message including resource uri which server doesn't
have.

Change-Id: Idf29a43aeca5a919c0b22d3f0cd9ce507c8935ab
Signed-off-by: Jaewook Jung <jw0213.jung@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20297Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: Uze Choi <uzchoi@samsung.com>