eloop: fix not returning new counter object

We forgot to actually store the pointer to the new counter object in the
\out variable. Fix this now.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

src/eloop.c

@@ -1143,6 +1143,7 @@ int ev_eloop_new_counter(struct ev_eloop *eloop, struct ev_counter **out,
 	}
 
 	ev_counter_unref(cnt);
+	*out = cnt;
 	return 0;
 }