Function sound_render_start_frame

sndlib/sndrender.cpp:71–77

if this fails, renderer won't work, do emulation.

// if this fails, renderer won't work, do emulation.
bool sound_render_start_frame() {
  Geometry = Sound_system.m_ll_sound_ptr->GetGeometryInterface();
  if (Geometry) {
    Geometry->StartFrame();
  }
  return Geometry ? true : false;
}

// ends a frame
void sound_render_end_frame() {