cpghum: Fix type of recv_crc

Fixes build on FreeBSD which doesn't have ulong

Signed-off-by: Ruben Kerkhof <ruben@rubenkerkhof.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>

test/cpghum.c

@@ -116,7 +116,7 @@ static void cpg_bm_deliver_fn (
 {
 	int *value = msg;
 	uLong crc=0;
-	ulong recv_crc = value[1] & 0xFFFFFFFF;
+	uLong recv_crc = value[1] & 0xFFFFFFFF;
 
 	packets_recvd++;
 	g_recv_length = msg_len;