Fix normalization in scalar addition
Fix normalization in scalar addition

rust-lang/num,rust-num/num-traits,rust-num/num-traits,koverstreet/num,rust-num/num-integer,rust-num/num-bigint,rust-num/num-bigint,rust-lang/num,rust-num/num,rust-num/num,rust-num/num-integer,koverstreet/num