Pre-initialize variable to fix warning with gcc. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4708 6f19259b-4bc3-4df7-8a09-765794883524
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4599 6f19259b-4bc3-4df7-8a09-765794883524