Add lib/, t/lib/, and sandbox/. All modules are updated and passing on MySQL 5.1.

t/lib/samples/issue_941.sql

@@ -0,0 +1,51 @@
+drop database if exists issue_941;
+create database issue_941;
+use issue_941;
+
+create table i (
+   i int not null,
+   unique key (i)
+);
+insert into i values (0),(100),(101),(102),(103),(104),(105),(106),(107);
+
+create table i_neg (
+   i_neg int not null,
+   unique key (i_neg)
+);
+insert into i_neg values (-10),(-9),(-8),(-7),(-6),(-5),(-4),(-2);
+
+create table i_neg_pos (
+   i_neg_pos int not null,
+   unique key (i_neg_pos)
+);
+insert into i_neg_pos values (-10),(-9),(-8),(-7),(-6),(-5),(-4),(-2),(-1),(0),(1),(2),(3),(4);
+
+create table i_null (
+   i_null int,
+   unique key (i_null)
+);
+insert into i_null values (null),(100),(101),(102),(103),(104),(105),(106),(107);
+
+create table d (
+   d  date not null,
+   unique key (d)
+);
+insert into d values
+   ('0000-00-00'),
+   ('2010-03-01'),
+   ('2010-03-02'),
+   ('2010-03-03'),
+   ('2010-03-04'),
+   ('2010-03-05');
+
+create table dt (
+   dt  datetime not null,
+   unique key (dt)
+);
+insert into dt values
+   ('0000-00-00 00:00:00'),
+   ('2010-03-01 02:01:00'),
+   ('2010-03-01 10:06:00'),
+   ('2010-03-03 11:03:00'),
+   ('2010-03-03 05:00:00'),
+   ('2010-03-05 00:30:00');