Set correct buffer size for audio FFT #859
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In #728 I added an extra argument to
make_rx_fft_f. Due to merge conflicts, the change was manually merged in c41d989, but the extra argument was lost in receiver.cpp. As a result,d_audio_rateis set to 1 (=WIN_HANN), which makes the circular FFT buffer small and the audio FFT & waterfall choppy. Here I've added back the missing argument, and the audio waterfall is smooth once again.