Fix final fft result not being set to zeroes on init

Since we use the previous value for averaging over time if the initial
value is unitialized memory we will get undefined values for first sample.

jumaudio.c

@@ -244,7 +244,8 @@ ma_int32 jum_startPlayback(jum_AudioSetup* setup, const char* filepath, ma_int32
  }
  }
 
- printf("Starting playback of '%s', on device [%d]'%s'\n", filepath, device_index, selected_device_name);
+ printf("Starting playback of '%s', on device [%d]'%s'\n", filepath, device_index,
+ selected_device_name);
  jum_printAudioInfo(setup->info);
 #endif
 
@@ -520,9 +521,9 @@ jum_FFTSetup* jum_initFFT(const float freq_points[][2], ma_int32 freqs_sz,
  jum_FFTSetup* setup = (jum_FFTSetup*)malloc(sizeof(jum_FFTSetup));
 
  initPFFFT(&setup->pffft, fft_sz);
- setup->raw = (float*)malloc(num_bins * sizeof(float));
- setup->averaged = (float*)malloc(num_bins * sizeof(float));
- setup->result = (float*)malloc(num_bins * sizeof(float));
+ setup->raw = (float*)calloc(num_bins, sizeof(float));
+ setup->averaged = (float*)calloc(num_bins, sizeof(float));
+ setup->result = (float*)calloc(num_bins, sizeof(float));
 
  setup->luts.freqs = (float*)malloc(num_bins * sizeof(float));
  buildFreqTable(setup->luts.freqs, num_bins, freq_points, freqs_sz);