Meanwhile, unnecessary (UINTN) typecast is removed and a buffer truncating bug is fixed. The buffer truncating bug may cause DevicePathToText generates wrong text representation if a input device path is too long. Signed-off-by: niruiyu Reviewed-by: tye Reviewed-by: jjin9 git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12276 6f19259b-4bc3-4df7-8a09-765794883524