sigProcLib: Slice SoftVector instead of signalVector for GMSK demod.

This makes it similar to 8-PSK demod and also saves a bit of lines ofcode and
should give us a tiny improvement in performance.

Ideally we need to remove vector slicing at all, because in osmo-bts-trx
we convert back to +-1.0 again (actually to +-127, but it doesn't mater).
So we should rather transmit +-1.0 values to avoid double conversion.

Change-Id: If9ed6f0f80fbe88c994b2f9c3cae91d0d57f4442
diff --git a/Transceiver52M/sigProcLib.h b/Transceiver52M/sigProcLib.h
index 7dca71f..ed72430 100644
--- a/Transceiver52M/sigProcLib.h
+++ b/Transceiver52M/sigProcLib.h
@@ -101,8 +101,8 @@
 			unsigned startIx = 0,
 			unsigned len = 0);
 
-/** Operate soft slicer on real-valued portion of vector */ 
-bool vectorSlicer(signalVector *x);
+/** Operate soft slicer on a soft-bit vector */
+bool vectorSlicer(SoftVector *x);
 
 /** GMSK modulate a GSM burst of bits */
 signalVector *modulateBurst(const BitVector &wBurst,