netfilter: ipset: adding ranges to hash types with timeout could still fail, fixed

The patch "Fix adding ranges to hash types" had got a mistypeing
in the timeout variant of the hash types, which actually made
the patch ineffective. Fixed!
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>

include/linux/netfilter/ipset/ip_set_ahash.h

@@ -835,7 +835,7 @@ type_pf_tadd(struct ip_set *set, void *value, u32 timeout, u32 flags)
 	}
 	ret = type_pf_elem_tadd(n, d, timeout);
 	if (ret != 0) {
-		if (ret == -EEXIST)
+		if (ret == -EAGAIN)
 			type_pf_data_next(h, d);
 		goto out;
 	}