src/core/combined_workers.c: allocate memory before using it

src/core/combined_workers.c

@@ -1,7 +1,7 @@
 /* StarPU --- Runtime system for heterogeneous multicore architectures.
  *
  * Copyright (C) 2010-2014  Université de Bordeaux 1
- * Copyright (C) 2010, 2011  Centre National de la Recherche Scientifique
+ * Copyright (C) 2010, 2011, 2014  Centre National de la Recherche Scientifique
  *
  * StarPU is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -100,7 +100,8 @@ int starpu_combined_worker_assign_workerid(int nworkers, int workerid_array[])
 		&config->combined_workers[combined_worker_id];
 
 	combined_worker->worker_size = nworkers;
-
+	combined_worker->perf_arch.devices = (struct starpu_perfmodel_device*)malloc(sizeof(struct starpu_perfmodel_device));
+	combined_worker->perf_arch.ndevices = 1;
 	combined_worker->perf_arch.devices[0].type = config->workers[workerid_array[0]].perf_arch.devices[0].type;
 	combined_worker->perf_arch.devices[0].devid = config->workers[workerid_array[0]].perf_arch.devices[0].devid; 
 	combined_worker->perf_arch.devices[0].ncores = nworkers - 1;