rem: static int communication_test(void *data)
add: static int32 communication_test(void *data)
context: static int communication_test(void *data){	int times = (int)data;	int i, code;	char buffer[1024];	thread_id sender;		for (i=0; i<times; i++) {		code = receive_data(&sender, (void *)buffer, sizeof(buffer));		printf(" -> received (%d): \"%s\"\n", code, buffer);	}	return 0;}