netfilter: xtables: do not print any messages on ENOMEM

ENOMEM is a very obvious error code (cf. EINVAL), so I think we do not
really need a warning message. Not to mention that if the allocation
fails, the user is most likely going to get a stack trace from slab
already.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/net/netfilter/xt_statistic.c b/net/netfilter/xt_statistic.c
index d8c0f8f..51ac1bb 100644
--- a/net/netfilter/xt_statistic.c
+++ b/net/netfilter/xt_statistic.c
@@ -61,10 +61,8 @@
 		return false;
 
 	info->master = kzalloc(sizeof(*info->master), GFP_KERNEL);
-	if (info->master == NULL) {
-		printk(KERN_ERR KBUILD_MODNAME ": Out of memory\n");
+	if (info->master == NULL)
 		return false;
-	}
 	info->master->count = info->u.nth.count;
 
 	return true;