Transceiver: Move soft bits normalization to pullRadioVector()

That's where all the filling logic happens, while in driveReceiveFIFO we
mostly want to take the burst, generate a message and sent it over the
socket.

Related: OS#4006
Change-Id: Ibfb48877af4ff5ef0f56390901669c8353beaf48

Transceiver52M/Transceiver.cpp

@@ -649,6 +649,9 @@ bool Transceiver::pullRadioVector(size_t chan, struct trx_ul_burst_ind *bi)
   else /* size() here is actually gSlotLen + 8, due to guard periods */
     bi->nbits = gSlotLen;
 
+  // Convert -1..+1 soft bits to 0..1 soft bits
+  vectorSlicer(bi->rxBurst);
+
   delete radio_burst;
   return true;
 }
@@ -928,9 +931,6 @@ void Transceiver::driveReceiveFIFO(size_t chan)
   if (!pullRadioVector(chan, &bi))
         return;
 
-  // Convert -1..+1 soft bits to 0..1 soft bits
-  vectorSlicer(bi.rxBurst);
-
   logRxBurst(chan, &bi);
 
   TOAint = (int) (bi.toa * 256.0 + 0.5); // round to closest integer