Fix load array termination

tests/fpga/max_fpga_advanced_static.c

@@ -200,6 +200,7 @@ int main(int argc, char **argv)
 	load[0].file = MyTasks_init();
 	load[0].engine_id_pattern = "*";
 	load[1].file = NULL;
+	load[1].engine_id_pattern = NULL;
 
 	starpu_conf_init(&conf);
 	conf.sched_policy_name = "eager";

tests/fpga/max_fpga_dynamic.c

@@ -180,6 +180,7 @@ int main(int argc, char **argv)
 	load[0].file = maxfile;
 	load[0].engine_id_pattern = "*";
 	load[1].file = NULL;
+	load[1].engine_id_pattern = NULL;
 
 	starpu_conf_init(&conf);
 	conf.sched_policy_name = "eager";

tests/fpga/max_fpga_mux.c

@@ -239,6 +239,7 @@ int main(int argc, char **argv)
 	load[0].file = maxfile;
 	load[0].engine_id_pattern = "*";
 	load[1].file = NULL;
+	load[1].engine_id_pattern = NULL;
 
 	starpu_conf_init(&conf);
 	conf.sched_policy_name = "eager";