ofdmframesync: fixing bug in initial equalizer estimate
ofdmframesync: fixing bug in initial equalizer estimate

  * using wrong complex gain index
  * effectively ignored averaging/smoothing

cjcliffe/liquid-dsp,JayKickliter/liquid-dsp,biotrump/liquid-dsp,wangning223/liquid-dsp,cjcliffe/liquid-dsp,JayKickliter/liquid-dsp,andrepuschmann/liquid-dsp,manuts/liquid-dsp,JayKickliter/liquid-dsp,jgaeddert/liquid-dsp,cjcliffe/liquid-dsp,jgaeddert/liquid-dsp,jgaeddert/liquid-dsp,andrepuschmann/liquid-dsp,wangning223/liquid-dsp,manuts/liquid-dsp,biotrump/liquid-dsp,andrepuschmann/liquid-dsp,wangning223/liquid-dsp,manuts/liquid-dsp,jgaeddert/liquid-dsp,manuts/liquid-dsp,biotrump/liquid-dsp,jgaeddert/liquid-dsp,JayKickliter/liquid-dsp,cjcliffe/liquid-dsp,biotrump/liquid-dsp,biotrump/liquid-dsp,andrepuschmann/liquid-dsp,wangning223/liquid-dsp,cjcliffe/liquid-dsp,JayKickliter/liquid-dsp,manuts/liquid-dsp,wangning223/liquid-dsp,andrepuschmann/liquid-dsp