Fix block test

tests/PrrtBlock_tests.cpp

@@ -225,7 +225,7 @@ TEST_F(PrrtBlockTest, NoCodingConfigured)
 
     uint32_t pkt_count = encBlock->dataPacketCount;
     for(j = 0; j < pkt_count; j++) {
-        PrrtPacket *data_pkt = PrrtBlock_get_first_data(encBlock);
+        PrrtPacket *data_pkt = PrrtBlock_get_next_data(encBlock);
         ASSERT_EQ(refPackets[j]->sequenceNumber, data_pkt->sequenceNumber);
     }
     uint32_t red_count = encBlock->redPacketCount;