Fix block test

tests/PrrtBlock_tests.cpp

@@ -223,7 +223,7 @@ TEST_F(PrrtBlockTest, NoCodingConfigured)
     uint32_t j = 0;
     PrrtBlock_encode(encBlock, &base);
 
-    uint32_t pkt_count = List_count(encBlock->dataPackets);
+    uint32_t pkt_count = encBlock->dataPacketCount;
     for(j = 0; j < pkt_count; j++) {
         PrrtPacket *data_pkt = PrrtBlock_get_first_data(encBlock);
         ASSERT_EQ(refPackets[j]->sequenceNumber, data_pkt->sequenceNumber);