[vdr] VDR with S2API (update)

[Klaus Schmidinger]

Attached is an updated version of the patch to make VDR use
the S2API. Dominik Strasser reported that he got log entries like

  Dec  6 18:39:02 VDR vdr: [4102] ERROR: frontend 0: Das Argument ist ungültig
  Dec  6 18:39:02 VDR kernel: DVB: adapter 0 frontend 1935763502 symbol rate 0 out of range (451875..7230000)

and I now also get

  Dec  7 13:03:26 vdr2 vdr: [3441] ERROR: frontend 0: Invalid argument
  Dec  7 13:03:26 vdr2 kernel: DVB: adapter 0 frontend 0 symbol rate 0 out of range (5000000..45000000)

when trying to tune to a DVB-S2 channel.

The attached patch logs the value put into the DTV_SYMBOL_RATE slot,
and it appears to be fine. Why the value falls back to 0 when tuning
is currently totally unclear (as is the large frontend value in Dominik's
case).

Any help in debugging this would be appreciated.

Note the comment in my initial posting about the patch to the driver required
for detecting DVB-S2 (or modifiy the line using FE_CAN_2ND_GEN_MODULATION in
cDvbDevice::cDvbDevice()).

Klaus
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