Fix build warnings 55/62455/1 accepted/tizen_3.0.m2_mobile accepted/tizen_3.0.m2_tv accepted/tizen_3.0.m2_wearable accepted/tizen_3.0_common accepted/tizen_3.0_ivi accepted/tizen_3.0_mobile accepted/tizen_3.0_tv accepted/tizen_3.0_wearable accepted/tizen_4.0_unified accepted/tizen_5.0_unified accepted/tizen_common accepted/tizen_ivi accepted/tizen_mobile accepted/tizen_tv accepted/tizen_wearable tizen_3.0 tizen_3.0.m2 tizen_3.0_tv tizen_4.0 tizen_4.0_tv tizen_5.0 accepted/tizen/3.0.m2/mobile/20170104.125213 accepted/tizen/3.0.m2/tv/20170104.125555 accepted/tizen/3.0.m2/wearable/20170104.125757 accepted/tizen/3.0/common/20161114.105753 accepted/tizen/3.0/ivi/20161011.053512 accepted/tizen/3.0/mobile/20161015.032250 accepted/tizen/3.0/tv/20161016.003415 accepted/tizen/3.0/wearable/20161015.080327 accepted/tizen/4.0/unified/20170816.011032 accepted/tizen/4.0/unified/20170829.020428 accepted/tizen/5.0/unified/20181102.015945 accepted/tizen/common/20160316.160758 accepted/tizen/ivi/20160318.111916 accepted/tizen/mobile/20160318.111207 accepted/tizen/tv/20160318.111445 accepted/tizen/unified/20170309.033516 accepted/tizen/wearable/20160318.111533 submit/tizen/20160316.075849 submit/tizen_3.0.m2/20170104.093750 submit/tizen_3.0_common/20161104.104000 submit/tizen_3.0_ivi/20161010.000000 submit/tizen_3.0_ivi/20161010.000010 submit/tizen_3.0_mobile/20161015.000000 submit/tizen_3.0_tv/20161015.000000 submit/tizen_3.0_wearable/20161015.000000 submit/tizen_4.0/20170811.094300 submit/tizen_4.0/20170828.100004 submit/tizen_4.0/20170828.110004 submit/tizen_5.0/20181101.000003 submit/tizen_unified/20170308.100408 tizen_4.0.IoT.p1_release tizen_4.0.IoT.p2_release tizen_4.0.m1_release tizen_4.0.m2_release