From a0c40d5a1b8537a6338dacc27a88d236077ab785 Mon Sep 17 00:00:00 2001
From: Sean Hall <r.sean.hall@gmail.com>
Date: Sun, 18 Oct 2020 16:01:24 -0500
Subject: Allow unsetting version variables.

---
 src/engine/EngineForApplication.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'src/engine/EngineForApplication.cpp')

diff --git a/src/engine/EngineForApplication.cpp b/src/engine/EngineForApplication.cpp
index c5eb5467..87a0782c 100644
--- a/src/engine/EngineForApplication.cpp
+++ b/src/engine/EngineForApplication.cpp
@@ -583,8 +583,11 @@ static HRESULT BAEngineSetVariableVersion(
 
     if (wzVariable && *wzVariable)
     {
-        hr = VerParseVersion(wzValue, 0, FALSE, &pVersion);
-        ExitOnFailure(hr, "Failed to parse new version value.");
+        if (wzValue)
+        {
+            hr = VerParseVersion(wzValue, 0, FALSE, &pVersion);
+            ExitOnFailure(hr, "Failed to parse new version value.");
+        }
 
         hr = VariableSetVersion(&pContext->pEngineState->variables, wzVariable, pVersion, FALSE);
         ExitOnFailure(hr, "Failed to set version variable.");
-- 
cgit v1.2.3-55-g6feb