The behaviour of a mismatched pair of allocation and deallocation is undefined
Also fixes a memory leak if malloc fails (which stops the application anyway)
Change-Id: I9c8bbade8531e8c9c02dcd43bac38cb954b3c89f
Introduce polyphase channelizer (Rx) and synthesis (Tx) filterbanks,
which serve as the signal processing backend for multi-carrier GSM.
Fast Fourier Transform (FFT) is used internally. FFTW is added as
a new build dependency.
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>