MDEV-33460 use the correct sql_mode and fix for --view

mysql-test/main/empty_string_literal.result

@@ -208,12 +208,13 @@ t1	CREATE TABLE `t1` (
   KEY `a` (`a`,`b`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 drop table t1;
+set sql_mode= default;
 #
 # MDEV-33460 select '123' 'x'; unexpected result
 #
 SELECT '';
-NULL
-NULL
+
+
 SELECT '' 'b' 'c';
 bc
 bc

mysql-test/main/empty_string_literal.test

@@ -25,12 +25,15 @@ flush tables;
 update t1 set a = 2;
 show create table t1;
 drop table t1;
+set sql_mode= default;
 
 --echo #
 --echo # MDEV-33460 select '123' 'x'; unexpected result
 --echo #
 
+--disable_view_protocol
 SELECT '';
+--enable_view_protocol
 SELECT '' 'b' 'c';
 SELECT '' '' 'c';
 SELECT 'a' '' 'c';