Transceiver52M: Preallocate head room for burst correlation

Set a transceiver high level length value that specifies the largest
number of complex or real filter taps that we will encounter. This
allows preallocation of head room and prevents an extra allocation and
copy on every incoming receive burst.

Signed-off-by: Thomas Tsou <tom@tsou.cc>
diff --git a/Transceiver52M/radioVector.cpp b/Transceiver52M/radioVector.cpp
index c50cfa5..8ab6695 100644
--- a/Transceiver52M/radioVector.cpp
+++ b/Transceiver52M/radioVector.cpp
@@ -31,6 +31,11 @@
 {
 }
 
+radioVector::radioVector(size_t size, size_t start, GSM::Time& wTime)
+	: signalVector(size, start), mTime(wTime)
+{
+}
+
 GSM::Time radioVector::getTime() const
 {
 	return mTime;