Fix compile warnings in srmutility unittest
Fix compile warnings in srmutility unittest

Unit test was emitting a warning due to type mismatch of the constant.
Corrected it by explicitly using the proper type.

Change-Id: I58a5aa4bacf551aeebf011069a38f47ed3888814
Signed-off-by: Ravi Nanjundappa <2b6ed790834a9696042087f8677f81934b9f07fd@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/1336
Reviewed-by: Jon A. Cruz <d4ae605477945a543a3ecda8955c93978db16a84@osg.samsung.com>
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Erich Keane <ec9f61fe526c14bb62c55d7c978f025ee6b3583d@intel.com>

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