MDEV-16166 RBR breaks with HA_ERR_KEY_NOT_FOUND upon DELETE from table...

with spatial index

So the issue is since it is spatial index , at the time of searching index
for key (Rows_log_event::find_row) we use wrong field image we use
Field::itRAW while we should be using Field::itMBR

mysql-test/suite/rpl/r/rpl_row_spatial.result

+include/master-slave.inc
+[connection master]
+CREATE TABLE t1 (g POINT NOT NULL, SPATIAL INDEX(g));
+INSERT INTO t1 VALUES (ST_GEOMFROMTEXT('Point(1 1)'));
+INSERT INTO t1 VALUES (ST_GEOMFROMTEXT('Point(2 1)'));
+INSERT INTO t1 VALUES (ST_GEOMFROMTEXT('Point(1 2)'));
+INSERT INTO t1 VALUES (ST_GEOMFROMTEXT('Point(2 2)'));
+DELETE FROM t1 where MBREqual(g, ST_GEOMFROMTEXT('Point(1 2)'));
+select count(*) from t1;
+count(*)
+3
+DELETE FROM t1;
+drop table t1;
+include/rpl_end.inc

mysql-test/suite/rpl/t/rpl_row_spatial.test

+--source include/have_binlog_format_row.inc
+--source include/master-slave.inc
+
+CREATE TABLE t1 (g POINT NOT NULL, SPATIAL INDEX(g));
+INSERT INTO t1 VALUES (ST_GEOMFROMTEXT('Point(1 1)'));
+INSERT INTO t1 VALUES (ST_GEOMFROMTEXT('Point(2 1)'));
+INSERT INTO t1 VALUES (ST_GEOMFROMTEXT('Point(1 2)'));
+INSERT INTO t1 VALUES (ST_GEOMFROMTEXT('Point(2 2)'));
+DELETE FROM t1 where MBREqual(g, ST_GEOMFROMTEXT('Point(1 2)'));
+
+--sync_slave_with_master
+select count(*) from t1;
+
+--connection master
+DELETE FROM t1;
+drop table t1;
+--source include/rpl_end.inc

sql/key.cc

@@ -145,7 +145,8 @@ void key_copy(uchar *to_key, uchar *from_record, KEY *key_info,
     {
       key_length-= HA_KEY_BLOB_LENGTH;
       length= min(key_length, key_part->length);
-      uint bytes= key_part->field->get_key_image(to_key, length, Field::itRAW);
+      uint bytes= key_part->field->get_key_image(to_key, length,
+		      key_info->flags & HA_SPATIAL ? Field::itMBR : Field::itRAW);
       if (with_zerofill && bytes < length)
         bzero((char*) to_key + bytes, length - bytes);
       to_key+= HA_KEY_BLOB_LENGTH;