Resolve warning from gcc. ('Digit' variable may be uninitialized) git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4839 6f19259b-4bc3-4df7-8a09-765794883524
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4693 6f19259b-4bc3-4df7-8a09-765794883524
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4612 6f19259b-4bc3-4df7-8a09-765794883524