Allocate bigger default thread stack because of problems with glibc
Fixed bug in UPDATE ... not_null_field=expression_that_returns_null
Fixed bug in replication when using auto_increment and LOAD DATA INFILE


include/my_global.h:
  Guard against compiling without -fno-exceptions
include/my_pthread.h:
  Allocate bigger default thread stack because of problems with glibc
mysql-test/r/null.result:
  Updated result
mysql-test/t/null.test:
  Test of using UPDATE/INSERT with NULL on not null fields.
sql/field_conv.cc:
  Fixed bug in UPDATE ... not_null_field=expression_that_returns_null
sql/sql_load.cc:
  Fixed bug in replication when using auto_increment and LOAD DATA INFILE