From 08eb12710cecc84e4721fe6b6da7de3645499612 Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Wed, 3 Jun 2020 03:37:46 +1000
Subject: [PATCH] audiovisualwaveform: ignore OverwriteSums if input data is
 empty

Prevents potential index out of bounds error.
---
 app/audio/audiovisualwaveform.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/audio/audiovisualwaveform.cpp b/app/audio/audiovisualwaveform.cpp
index 8ba87384e..c02588cc6 100644
--- a/app/audio/audiovisualwaveform.cpp
+++ b/app/audio/audiovisualwaveform.cpp
@@ -95,6 +95,10 @@ void AudioVisualWaveform::OverwriteSamples(SampleBufferPtr samples, int sample_r
 
 void AudioVisualWaveform::OverwriteSums(const AudioVisualWaveform &sums, const rational &start)
 {
+  if (sums.data_.isEmpty()) {
+    return;
+  }
+
   int start_index = time_to_samples(start);
   int end_index = start_index + sums.data_.size();