Fix a wrong conditional statement about token value.
Fix a wrong conditional statement about token value.

if the first byte of the token is 00, the condition will
return false even though the token is valid.

Change-Id: I7386cb3644f32e7d1cabb58a1ef8c7162cf19476
Signed-off-by: hyuna0213.jo <a3aecee2eabd6f87461b5d05d6fd0eaf35e269ed@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/8831
Reviewed-by: jihwan seo <69598d7552022c520cfdbefd16641727c7ff4ab5@samsung.com>
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Jon A. Cruz <44f878afe53efc66b76772bd845eb65944ed8232@joncruz.org>

iotivity/iotivity,rzr/iotivity,rzr/iotivity,rzr/iotivity,iotivity/iotivity,rzr/iotivity,rzr/iotivity,iotivity/iotivity,iotivity/iotivity,iotivity/iotivity,rzr/iotivity,rzr/iotivity,iotivity/iotivity,iotivity/iotivity,iotivity/iotivity