net_modem.c: Fix memory leak

src/network/net_modem.c

@@ -1,4 +1,3 @@
-
 /*
  * 86Box    A hypervisor and IBM PC system emulator that specializes in
  *          running old operating systems and software designed for IBM
@@ -323,9 +322,9 @@ send_tx_packet:
         buf[13] = 0x00;
         memcpy(buf + 14, processed_tx_packet, received);
         network_tx(modem->card, buf, received + 14);
-        free(processed_tx_packet);
         free(buf);
     }
+    free(processed_tx_packet);
     return;
 }
 
@@ -530,6 +529,7 @@ modem_enter_connected_state(modem_t* modem)
     modem->connected = true;
     modem->tcpIpMode = true;
     modem->cooldown = true;
+    modem->tx_count = 0;
     plat_netsocket_close(modem->serversocket);
     modem->serversocket = -1;
     memset(&modem->telClient, 0, sizeof(modem->telClient));