Fix returned value

examples/worker_collections/worker_list_example.c

@@ -1,6 +1,6 @@
 /* StarPU --- Runtime system for heterogeneous multicore architectures.
  *
- * Copyright (C) 2010-2013  Université de Bordeaux 1
+ * Copyright (C) 2010-2014  Université de Bordeaux 1
  * Copyright (C) 2010-2014  Centre National de la Recherche Scientifique
  *
  * StarPU is free software; you can redistribute it and/or modify
@@ -86,4 +86,6 @@ int main()
 	FPRINTF(stderr, "timing init = %lf \n", timing);
 	co->deinit(co);
 	starpu_shutdown();
+
+	return 0;
 }

examples/worker_collections/worker_tree_example.c

@@ -1,6 +1,6 @@
 /* StarPU --- Runtime system for heterogeneous multicore architectures.
  *
- * Copyright (C) 2010-2013  Université de Bordeaux 1
+ * Copyright (C) 2010-2014  Université de Bordeaux 1
  * Copyright (C) 2010-2014  Centre National de la Recherche Scientifique
  *
  * StarPU is free software; you can redistribute it and/or modify
@@ -95,5 +95,7 @@ int main()
 
 	co->deinit(co);
 	starpu_shutdown();
+
+	return 0;
 }
 #endif