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
diff --git a/Transceiver52M/Transceiver.cpp b/Transceiver52M/Transceiver.cpp
index 5a6b652..a6a32f0 100644
--- a/Transceiver52M/Transceiver.cpp
+++ b/Transceiver52M/Transceiver.cpp
@@ -649,6 +649,9 @@
   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 @@
   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