Ieee80211OFDMEncoder: fixed a constructor.
Ieee80211OFDMModulator: fixed comparison between signed and unsigned integer.
Ieee80211OFDMReceiver: memory leak.
Ieee80211OFDMTransmitter: ptr initialization.
Ieee80211OFDMCode: added destructor.
ConvolutionalCoder: fixed memory leak PID 77991.
Modulation: fixed integer division.
Ieee80211OFDMModulator: removed unused member variable.