Avoid memcpy. BUG=176 TEST=NONE Review URL: https://webrtc-codereview.appspot.com/1081004
Avoid memcpy.
BUG=176
TEST=NONE
Review URL: https://webrtc-codereview.appspot.com/1081004

git-svn-id: a51711482b6ba0e1d1ab095578a045eeae45ac9a@552 16f28f9a-4ce2-e073-06de-1de4eb20be90

PeterXu/libyuv,pol51/libyuv-CMake,rig-project/libyuv,phlizik/libyuv,jpxiong/libyuv,CyanogenMod/android_external_chromium_org_third_party_libyuv,jpxiong/libyuv,granalberto/libyuv,okumura/chromium-external-libyuv,laperry1/android_external_chromium_org_third_party_libyuv,rig-project/libyuv,godghdai/libyuv,xin3liang/platform_external_chromium_org_third_party_libyuv,xin3liang/platform_external_chromium_org_third_party_libyuv,xlncz/libyuv,geekboxzone/lollipop_external_chromium_org_third_party_libyuv,lyx2014/libyuv_free,laperry1/android_external_chromium_org_third_party_libyuv,okumura/libyuv,xlncz/libyuv,PeterXu/libyuv,Omegaphora/external_chromium_org_third_party_libyuv,granalberto/libyuv,rig-project/libyuv,Gekkio/libyuv,disigma/yuv,AOSPU/external_chromium_org_third_party_libyuv,okumura/chromium-external-libyuv,openpeer/libyuv,godghdai/libyuv,lemenkov/libyuv,android-ia/platform_external_chromium_org_third_party_libyuv,lyx2014/libyuv_free,lemenkov/libyuv,bpsinc-native/src_third_party_libyuv,MIPS/external-chromium_org-third_party-libyuv,jgcaaprom/android_external_chromium_org_third_party_libyuv,Bilibili/libyuv,granalberto/libyuv,Omegaphora/external_chromium_org_third_party_libyuv,yarrcc/libyuv-ios,okumura/libyuv,AOSPU/external_chromium_org_third_party_libyuv,yarrcc/libyuv-ios,lemenkov/libyuv,android-ia/platform_external_chromium_org_third_party_libyuv,lyx2014/libyuv_free,okumura/chromium-external-libyuv,godghdai/libyuv,Bilibili/libyuv,jgcaaprom/android_external_chromium_org_third_party_libyuv,labdong801/libyuv,MIPS/external-chromium_org-third_party-libyuv,PeterXu/libyuv,CyanogenMod/android_external_chromium_org_third_party_libyuv,MIPS/external-chromium_org-third_party-libyuv,archos-sa/libyuv-avp,Omegaphora/external_chromium_org_third_party_libyuv,okumura/libyuv,archos-sa/libyuv-avp,lyx2014/yuv,lemenkov/libyuv,Gekkio/libyuv,android-ia/platform_external_chromium_org_third_party_libyuv,labdong801/libyuv,jgcaaprom/android_external_chromium_org_third_party_libyuv,lyx2014/yuv,phlizik/libyuv,openpeer/libyuv,openpeer/libyuv,laperry1/android_external_chromium_org_third_party_libyuv,bpsinc-native/src_third_party_libyuv,phlizik/libyuv,granalberto/libyuv,geekboxzone/lollipop_external_chromium_org_third_party_libyuv,pol51/libyuv-CMake,AOSPU/external_chromium_org_third_party_libyuv,pol51/libyuv-CMake,lyx2014/libyuv_free,bpsinc-native/src_third_party_libyuv,labdong801/libyuv,Bilibili/libyuv,yarrcc/libyuv-ios,Gekkio/libyuv,geekboxzone/lollipop_external_chromium_org_third_party_libyuv,archos-sa/libyuv-avp,lyx2014/yuv,CyanogenMod/android_external_chromium_org_third_party_libyuv,disigma/yuv,lyx2014/yuv,jpxiong/libyuv,disigma/yuv,xlncz/libyuv,xlncz/libyuv,xin3liang/platform_external_chromium_org_third_party_libyuv,yarrcc/libyuv-ios