From 56c0d30f83ba63d45e8426b68f43c1d716eab963 Mon Sep 17 00:00:00 2001
From: harry <hrosen2016@gmail.com>
Date: Sun, 19 Feb 2023 15:22:34 -0500
Subject: [PATCH] Fix crash in Qt CDL when cdloggerVideoDataSize is zero.

---
 src/drivers/Qt/CodeDataLogger.cpp | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/drivers/Qt/CodeDataLogger.cpp b/src/drivers/Qt/CodeDataLogger.cpp
index 62d49dbb..8d6b5908 100644
--- a/src/drivers/Qt/CodeDataLogger.cpp
+++ b/src/drivers/Qt/CodeDataLogger.cpp
@@ -790,7 +790,14 @@ void InitCDLog(void)
 	if (!CHRram[0] || (CHRptr[0] == PRGptr[0]))
 	{ // Some kind of workaround for my OneBus VRAM hack, will remove it if I find another solution for that
 		cdloggerVideoDataSize = CHRsize[0];
-		cdloggervdata = (unsigned char *)malloc(cdloggerVideoDataSize);
+		if (cdloggerVideoDataSize > 0)
+		{
+			cdloggervdata = (unsigned char *)malloc(cdloggerVideoDataSize);
+		}
+		else
+		{
+			cdloggervdata = nullptr;
+		}
 	}
 	else
 	{
@@ -832,7 +839,10 @@ void ResetCDLog(void)
 		if (GameInfo->type != GIT_NSF)
 		{
 			undefinedvromcount = 8192;
-			memset(cdloggervdata, 0, 8192);
+			if (cdloggervdata != NULL)
+			{
+				memset(cdloggervdata, 0, 8192);
+			}
 		}
 	}
 	FCEU_WRAPPER_UNLOCK();