Fix for

BUG#797 "If query ignored on slave (replicate-ignore-table) the slave still checks if
the returned error (0) is the same as the one on the master, whereas it shouldn't
test this.
Plus a new test for BUG#797.

mysql-test/r/rpl_error_ignored_table.result

@@ -0,0 +1,15 @@
+slave stop;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+reset master;
+reset slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+slave start;
+create table t1 (a int primary key);
+insert into t1 values (1),(1);
+Duplicate entry '1' for key 1
+show slave status;
+Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space
+127.0.0.1	root	9306	1	master-bin.001	213	slave-relay-bin.002	254	master-bin.001	Yes	Yes			0		0	213	254
+show tables like 't1';
+Tables_in_test (t1)
+drop table t1;

mysql-test/t/rpl_error_ignored_table-slave.opt

@@ -0,0 +1 @@
+--replicate-ignore-table=test.t1

mysql-test/t/rpl_error_ignored_table.test

@@ -0,0 +1,22 @@
+# Test for 
+# Bug #797: If a query is ignored on slave (replicate-ignore-table) the slave
+# still checks that it has the same error as on the master.
+
+source include/master-slave.inc;
+connection master;
+create table t1 (a int primary key);
+# generate an error that goes to the binlog
+--error 1062;
+insert into t1 values (1),(1);
+save_master_pos;
+connection slave;
+# as the t1 table is ignored on the slave, the slave should be able to sync
+sync_with_master;
+show slave status;
+# check that the table has been ignored, because otherwise the test is nonsense
+show tables like 't1';
+connection master;
+drop table t1;
+save_master_pos;
+connection slave;
+sync_with_master;