SET wsrep_on=1 - only check innodb_lock_schedule_algorithm if innodb is enabled

sql/wsrep_var.cc

@@ -47,6 +47,7 @@ int wsrep_init_vars()
 linking will succeed even if the server is built with a dynamically
 linked InnoDB. */
 ulong innodb_lock_schedule_algorithm __attribute__((weak));
+struct handlerton* innodb_hton_ptr __attribute__((weak));
 
 bool wsrep_on_update (sys_var *self, THD* thd, enum_var_type var_type)
 {
@@ -65,7 +66,7 @@ bool wsrep_on_check(sys_var *self, THD* thd, set_var* var)
   if (check_has_super(self, thd, var))
     return true;
 
-  if (new_wsrep_on && innodb_lock_schedule_algorithm != 0) {
+  if (new_wsrep_on && innodb_hton_ptr && innodb_lock_schedule_algorithm != 0) {
     my_message(ER_WRONG_ARGUMENTS, " WSREP (galera) can't be enabled "
 	    "if innodb_lock_schedule_algorithm=VATS. Please configure"
 	    " innodb_lock_schedule_algorithm=FCFS and restart.", MYF(0));