[IOT-2344] Use correct index when checking for alloc failure.

[IOT-2344] Use correct index when checking for alloc failure.

dimensions[0] and i may be different values.  The urlInfo is allocated
to dimensions[0] but checked against i.

Bug: https://jira.iotivity.org/browse/IOT-2344
Change-Id: Ibff3fc62d551417a71e7496027452b3d88cad413
Signed-off-by: Todd Malsbary <todd.malsbary@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20271
Reviewed-by: Srikrishna Gurugubelli <srikguru@microsoft.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>