Fix build with gcc-6 82/104282/1 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_common accepted/tizen_ivi accepted/tizen_mobile accepted/tizen_tv accepted/tizen_wearable tizen_3.0 tizen_4.0 tizen_4.0_tv accepted/tizen/3.0/common/20170822.162239 accepted/tizen/3.0/ivi/20170822.054701 accepted/tizen/3.0/ivi/20170822.054705 accepted/tizen/3.0/mobile/20170822.054639 accepted/tizen/3.0/tv/20170822.054644 accepted/tizen/3.0/tv/20170822.054647 accepted/tizen/3.0/wearable/20170822.054657 accepted/tizen/4.0/unified/20170816.014003 accepted/tizen/4.0/unified/20170828.222959 accepted/tizen/common/20161215.170218 accepted/tizen/ivi/20161215.073852 accepted/tizen/mobile/20161215.073757 accepted/tizen/tv/20161215.073828 accepted/tizen/unified/20170309.040306 accepted/tizen/wearable/20161215.073832 submit/tizen/20161215.002958 submit/tizen_3.0/20170822.015056 submit/tizen_3.0/20170822.020756 submit/tizen_4.0/20170811.094300 submit/tizen_4.0/20170828.100006 submit/tizen_unified/20170308.100415 tizen_4.0.IoT.p1_release tizen_4.0.IoT.p2_release tizen_4.0.m1_release tizen_4.0.m2_release upstream/1.03