af_unix: netns: fix problem of return value

fix problem of return value

net/unix/af_unix.c: unix_net_init()
when error appears, it should return 'error', not always return 0.

Signed-off-by: Jianjun Kong <jianjun@zeuux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index dc504d3..4d3c607 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2213,7 +2213,7 @@
 #endif
 	error = 0;
 out:
-	return 0;
+	return error;
 }
 
 static void unix_net_exit(struct net *net)