inetntop() was using a wrong sizeof() which could trigger a message

about an overflow with eg 'STATS maxperip' (IRCOp-only command).
Also, STATS maxperip failed to return 1 in the hook, resulting in
unnecessary STATS help output after the list.

src/modules/maxperip.c

@@ -340,7 +340,7 @@ int stats_maxperip(Client *client, const char *para)
 		}
 	}
 
-	return 0;
+	return 1;
 }
 
 /** Returns 1 if allow::maxperip is exceeded by 'client' */

src/support.c

@@ -142,7 +142,7 @@ const char *inetntop(int af, const void *in, char *out, size_t size)
 {
 	char tmp[MYDUMMY_SIZE];
 
-	inet_ntop(af, in, tmp, size);
+	inet_ntop(af, in, tmp, sizeof(tmp));
 	if (!strstr(tmp, "::"))
 	{
 		/* IPv4 or IPv6 that is already uncompressed */