From d549dccefdab3fead52e76753dc1ecf8a465ab19 Mon Sep 17 00:00:00 2001
From: James Crook <james.k.crook@gmail.com>
Date: Sat, 20 May 2017 18:31:06 +0100
Subject: [PATCH] Bug 1649 - Freeze with Truncate Silence

---
 src/effects/TruncSilence.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/effects/TruncSilence.cpp b/src/effects/TruncSilence.cpp
index bde22e29e..f2bcb82de 100644
--- a/src/effects/TruncSilence.cpp
+++ b/src/effects/TruncSilence.cpp
@@ -486,6 +486,10 @@ bool EffectTruncSilence::DoRemoval
          if (t->GetEndTime() < r->start)
             continue;
 
+         // Don't waste time cutting nothing.
+         if( cutLen == 0.0 )
+            continue;
+
          double cutStart = (r->start + r->end - cutLen) / 2;
          double cutEnd = cutStart + cutLen;
          if (t->GetKind() == Track::Wave)