message: AudioStream_F32: release: return if block is null
diff: @@ -108,6 +108,7 @@ audio_block_f32_t * AudioStream_F32::allocate_f32(void)
  // returned to the free pool
  void AudioStream_F32::release(audio_block_f32_t *block)
  {
  + if (!block) return; //return if block is NULL
  uint32_t mask = (0x80000000 >> (31 - (block->memory_pool_index & 0x1F)));
  uint32_t index = block->memory_pool_index >> 5;
  