Allow row events in replication stream for slave in all cases

(even when configured with --binlog-format=statement).
Before we got an error on the slave and the slave stopped if the master
was configured with --binlog-format=mixed or --binlog-format=row.

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

+include/master-slave.inc
+[connection master]
+use test;
+create table t1 (a int primary key);
+insert into t1 values (1),(2),(3),(4),(5);
+update t1 set a=a*10;
+use test;
+select * from t1;
+a
+10
+20
+30
+40
+50
+include/show_binlog_events.inc
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+slave-bin.000001	#	Gtid	#	#	GTID #-#-#
+slave-bin.000001	#	Query	#	#	use `test`; create table t1 (a int primary key)
+slave-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+slave-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
+slave-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
+slave-bin.000001	#	Query	#	#	COMMIT
+slave-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
+slave-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
+slave-bin.000001	#	Update_rows_v1	#	#	table_id: # flags: STMT_END_F
+slave-bin.000001	#	Query	#	#	COMMIT
+drop table t1;
+include/rpl_end.inc

mysql-test/suite/rpl/t/rpl_row_to_stmt-master.opt

+--binlog-format=row

mysql-test/suite/rpl/t/rpl_row_to_stmt-slave.opt

+--binlog-format=statement

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

+#
+# check that master starterd with log-format=ROW replication can replicate to
+# slave started with log-format=STATEMENT
+#
+
+--source include/have_binlog_format_row.inc
+--source include/master-slave.inc
+
+use test;
+
+create table t1 (a int primary key);
+insert into t1 values (1),(2),(3),(4),(5);
+update t1 set a=a*10;
+
+sync_slave_with_master;
+use test;
+select * from t1;
+source include/show_binlog_events.inc;
+
+connection master;
+drop table t1;
+
+--source include/rpl_end.inc

sql/sql_class.cc

@@ -5156,16 +5156,13 @@ void xid_cache_delete(XID_STATE *xid_state)
      BINLOG_FORMAT = STATEMENT and at least one table uses a storage
      engine limited to row-logging.
 
-  6. Error: Cannot execute row injection: binlogging impossible since
-     BINLOG_FORMAT = STATEMENT.
-
-  7. Warning: Unsafe statement binlogged in statement format since
+  6. Warning: Unsafe statement binlogged in statement format since
      BINLOG_FORMAT = STATEMENT.
 
   In addition, we can produce the following error (not depending on
   the variables of the decision diagram):
 
-  8. Error: Cannot execute statement: binlogging impossible since more
+  7. Error: Cannot execute statement: binlogging impossible since more
      than one engine is involved and at least one engine is
      self-logging.
 
@@ -5444,10 +5441,10 @@ int THD::decide_logging_format(TABLE_LIST *tables)
         if (lex->is_stmt_row_injection())
         {
           /*
-            6. Error: Cannot execute row injection since
-               BINLOG_FORMAT = STATEMENT
+            We have to log the statement as row or give an error.
+            Better to accept what master gives us than stopping replication.
           */
-          my_error((error= ER_BINLOG_ROW_INJECTION_AND_STMT_MODE), MYF(0));
+          set_current_stmt_binlog_format_row();
         }
         else if ((flags_write_all_set & HA_BINLOG_STMT_CAPABLE) == 0 &&
                  sqlcom_can_generate_row_events(this))
@@ -5472,7 +5469,7 @@ int THD::decide_logging_format(TABLE_LIST *tables)
           DBUG_PRINT("info", ("binlog_unsafe_warning_flags: 0x%x",
                               binlog_unsafe_warning_flags));
         }
-        /* log in statement format! */
+        /* log in statement format (or row if row event)! */
       }
       /* No statement-only engines and binlog_format != STATEMENT.
          I.e., nothing prevents us from row logging if needed. */