Fix small issue with apply return value

src/packages/fff/fff-babel-bird2/files/lib/functions/fff/babeldaemon

@@ -27,6 +27,8 @@ babel_remove_custom_redistribute_filters() {
 babel_apply() {
 	# error output hidden because apply might be executed without a preceding configure step.
 	mv /tmp/bird-babel /etc/bird-babel 2>/dev/null
+
+	return 0
 }
 
 babel_reload() {