From 45fc22246784e5a5746ac57be9d7c29aa2990763 Mon Sep 17 00:00:00 2001
From: "Oleg V. Polivets" <jsbot@ya.ru>
Date: Tue, 2 Feb 2021 04:09:51 +0300
Subject: [PATCH] fix: ppuViewer crashes the app when ROM is not opened (#319)

---
 src/drivers/Qt/ppuViewer.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/drivers/Qt/ppuViewer.cpp b/src/drivers/Qt/ppuViewer.cpp
index 0987c38a..5c9136da 100644
--- a/src/drivers/Qt/ppuViewer.cpp
+++ b/src/drivers/Qt/ppuViewer.cpp
@@ -1255,6 +1255,9 @@ static void DrawPatternTable( ppuPatternTable_t *pattern, uint8_t *table, uint8_
 	int p=0,tmp;
 	uint8_t chr0,chr1,logs,shift;
 
+	if (!palo)
+		return;
+
 	pal <<= 2;
 	for (i = 0; i < 16; i++)		//Columns
 	{