after-merge fix: warning adjusted.

create table t1(a bit(1), b smallint unsigned);

insert into t1 (b, a) values ('2', '1');

Warnings:

Warning	1264	Out of range value adjusted for column 'a' at row 1

Warning	1264	Out of range value for column 'a' at row 1

select hex(a), b from t1;

hex(a)	b

1	2