examples/filters/fvector.c: display message on ENODEV

examples/filters/fvector.c

@@ -101,6 +101,7 @@ int main(int argc, char **argv)
 	return 0;
 
 enodev:
+	FPRINTF(stderr, "WARNING: No one can execute this task\n");
 	starpu_shutdown();
 	return 77;
 }