fixed coredump in UDF

added Monty's patch for alter table and LAST_INSERT_ID()
added a test case for replication of ALTER TABLE on a table with auto_increment


sql/item_func.cc:
  fixed a coredump in UDF
sql/sql_table.cc:
  fixed LAST_INSERT_ID() problem after ALTER TABLE on a table with auto_increment

repl-tests/test-repl-alter/run.test

+source ../include/master-slave.inc;
+connection master;
+drop table if exists test;
+CREATE TABLE test (name varchar(64), age smallint(3));
+INSERT INTO  test SET name='Andy', age=31;
+INSERT test SET name='Jacob', age=2;
+INSERT into test SET name='Caleb', age=1;
+ALTER TABLE test ADD id int(8) ZEROFILL AUTO_INCREMENT PRIMARY KEY;
+@test.master select * from test;
+connection slave;
+@test.master select * from test;
\ No newline at end of file

repl-tests/test-repl-alter/test.master

+name	age	id	
+Andy	31	00000001	
+Jacob	2	00000002	
+Caleb	1	00000003	

sql/item_func.cc

@@ -1140,7 +1140,9 @@ udf_handler::fix_fields(THD *thd,TABLE_LIST *tables,Item_result_field *func,
 	break;
       }
     }
-    thd->net.last_error[0]=0;
+    
+    if(thd)
+     thd->net.last_error[0]=0;
     my_bool (*init)(UDF_INIT *, UDF_ARGS *, char *)=
       (my_bool (*)(UDF_INIT *, UDF_ARGS *,  char *))
       u_d->func_init;

sql/sql_table.cc

@@ -32,7 +32,7 @@ static char *make_unique_key_name(const char *field_name,KEY *start,KEY *end);
 static int copy_data_between_tables(TABLE *from,TABLE *to,
 				    List<create_field> &create,
 				    enum enum_duplicates handle_duplicates,
-				    ulong *copied,ulong *deleted);
+				    ha_rows *copied,ha_rows *deleted);
 
 /*****************************************************************************
 ** Remove all possbile tables and give a compact errormessage for all
@@ -992,7 +992,8 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
   char tmp_name[80],old_name[32],new_name_buff[FN_REFLEN],
     *table_name,*db;
   bool use_timestamp=0;
-  ulong copied,deleted;
+  ha_rows copied,deleted;
+  ulonglong next_insert_id;
   uint save_time_stamp,db_create_options;
   enum db_type old_db_type,new_db_type;
   DBUG_ENTER("mysql_alter_table");
@@ -1333,11 +1334,13 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
   if (use_timestamp)
     new_table->time_stamp=0;
   new_table->next_number_field=new_table->found_next_number_field;
-  thd->count_cuted_fields=1;			/* calc cuted fields */
+  thd->count_cuted_fields=1;			// calc cuted fields
   thd->cuted_fields=0L;
   thd->proc_info="copy to tmp table";
+  next_insert_id=thd->next_insert_id;		// Remember for loggin
   error=copy_data_between_tables(table,new_table,create_list,handle_duplicates,
 				 &copied,&deleted);
+  thd->last_insert_id=next_insert_id;		// Needed for correct log
   thd->count_cuted_fields=0;			/* Don`t calc cuted fields */
   new_table->time_stamp=save_time_stamp;
 
@@ -1474,8 +1477,8 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
   VOID(pthread_mutex_unlock(&LOCK_open));
 
 end_temporary:
-  sprintf(tmp_name,ER(ER_INSERT_INFO),copied+deleted,deleted,
-	  thd->cuted_fields);
+  sprintf(tmp_name,ER(ER_INSERT_INFO),(ulong) (copied+deleted),
+	  (ulong) deleted, thd->cuted_fields);
   send_ok(&thd->net,copied+deleted,0L,tmp_name);
   thd->some_tables_deleted=0;
   DBUG_RETURN(0);
@@ -1488,7 +1491,7 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
 static int
 copy_data_between_tables(TABLE *from,TABLE *to,List<create_field> &create,
 			 enum enum_duplicates handle_duplicates,
-			 ulong *copied,ulong *deleted)
+			 ha_rows *copied,ha_rows *deleted)
 {
   int error;
   Copy_field *copy,*copy_end;