MDEV-6368: assertion xid_seqno > trx_sys_cur_xid_seqno (postfix)

- Fix build failure when built without wsrep (Win)
- Update the expected warning in sys_vars.wsrep_start_position

mysql-test/suite/sys_vars/r/wsrep_start_position_basic.result

@@ -27,7 +27,7 @@ SELECT @@global.wsrep_start_position;
 00000000-0000-0000-0000-000000000000:-1
 
 # invalid values
-call mtr.add_suppression("WSREP: SST postion can't be set in past.*");
+call mtr.add_suppression("WSREP: SST position can't be set in past. Requested: -2, Current:  -1.");
 SET @@global.wsrep_start_position='00000000-0000-0000-0000-000000000000:-2';
 ERROR 42000: Variable 'wsrep_start_position' can't be set to the value of '00000000-0000-0000-0000-000000000000:-2'
 SELECT @@global.wsrep_start_position;

mysql-test/suite/sys_vars/t/wsrep_start_position_basic.test

@@ -26,7 +26,7 @@ SELECT @@global.wsrep_start_position;
 
 --echo
 --echo # invalid values
-call mtr.add_suppression("WSREP: SST postion can't be set in past.*");
+call mtr.add_suppression("WSREP: SST position can't be set in past. Requested: -2, Current:  -1.");
 --error ER_WRONG_VALUE_FOR_VAR
 SET @@global.wsrep_start_position='00000000-0000-0000-0000-000000000000:-2';
 SELECT @@global.wsrep_start_position;

sql/wsrep_sst.h

@@ -75,7 +75,7 @@ extern void wsrep_SE_initialized(); /*! mark SE initialization complete */
 #define wsrep_SE_initialized() do { } while(0)
 #define wsrep_SE_init_grab() do { } while(0)
 #define wsrep_SE_init_done() do { } while(0)
-#define wsrep_sst_continue() do { } while(0)
+#define wsrep_sst_continue() (0)
 
 #endif /* WITH_WSREP */
 #endif /* WSREP_SST_H */