Add support for start delays for engine sounds.

research/ma_engine.c

@@ -40,6 +40,7 @@ int main(int argc, char** argv)
     ma_engine_sound_set_pan(&engine, &sound, 0.0f);
     ma_engine_sound_set_looping(&engine, &sound, MA_TRUE);
     //ma_engine_sound_seek_to_pcm_frame(&engine, &sound, 6000000);
+    ma_engine_sound_set_start_delay(&engine, &sound, 1110);
     ma_engine_sound_set_fade_in(&engine, &sound, 2000);
     ma_engine_sound_set_fade_out(&engine, &sound, 2000);
     ma_engine_sound_start(&engine, &sound);