Minor clean up.

research/miniaudio_engine.h

@@ -10316,7 +10316,7 @@ MA_API ma_result ma_engine_node_init(const ma_engine_node_config* pConfig, const
     */
 
     /* We'll always do resampling first. */
-    resamplerConfig = ma_resampler_config_init(ma_format_f32, baseNodeConfig.inputChannels[0], pConfig->sampleRate ? pConfig->sampleRate : ma_engine_get_sample_rate(pEngineNode->pEngine), ma_engine_get_sample_rate(pEngineNode->pEngine), ma_resample_algorithm_linear);
+    resamplerConfig = ma_resampler_config_init(ma_format_f32, baseNodeConfig.inputChannels[0], (pConfig->sampleRate > 0) ? pConfig->sampleRate : ma_engine_get_sample_rate(pEngineNode->pEngine), ma_engine_get_sample_rate(pEngineNode->pEngine), ma_resample_algorithm_linear);
     resamplerConfig.linear.lpfOrder = 0;    /* <-- Need to disable low-pass filtering for pitch shifting for now because there's cases where the biquads are becoming unstable. Need to figure out a better fix for this. */
 
     result = ma_resampler_init(&resamplerConfig, &pEngineNode->resampler);