Fix calling initialize_buffer on mpims slaves

tests/microbenchs/bandwidth.c

@@ -291,7 +291,7 @@ int main(int argc, char **argv)
 	total_ncpus = starpu_cpu_worker_get_count();
 
 	buffers = malloc(total_ncpus * sizeof(*buffers));
-	starpu_execute_on_each_worker_ex(initialize_buffer, NULL, STARPU_CPU, "init_buffer");
+	starpu_execute_on_each_worker_ex(initialize_buffer, NULL, STARPU_CPU, "initialize_buffer");
 	starpu_shutdown();
 
 	if (total_ncpus == 0)