From b425754fef09b9878e7b76308f489a3c499575fd Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Wed, 14 Apr 2021 13:47:33 +1000
Subject: [PATCH] audiovisualwaveform: don't draw empty sample

---
 app/audio/audiovisualwaveform.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/audio/audiovisualwaveform.cpp b/app/audio/audiovisualwaveform.cpp
index b21fcc361..cdec46a30 100644
--- a/app/audio/audiovisualwaveform.cpp
+++ b/app/audio/audiovisualwaveform.cpp
@@ -244,6 +244,10 @@ AudioVisualWaveform::Sample AudioVisualWaveform::ReSumSamples(const SamplePerCha
 
 void AudioVisualWaveform::DrawSample(QPainter *painter, const Sample& sample, int x, int y, int height, bool rectified)
 {
+  if (sample.isEmpty()) {
+    return;
+  }
+
   int channel_height = height / sample.size();
   int channel_half_height = channel_height / 2;