From 12b4f81c9f8c3845124df9160bf83415d3c8fecd Mon Sep 17 00:00:00 2001
From: Kreeblah <kreeblah@gmail.com>
Date: Sun, 24 Jan 2021 02:15:25 -0800
Subject: [PATCH] Added additional check for header retrieval

---
 Cart_Reader/NES.ino | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Cart_Reader/NES.ino b/Cart_Reader/NES.ino
index 2cede86..5cc6697 100644
--- a/Cart_Reader/NES.ino
+++ b/Cart_Reader/NES.ino
@@ -724,7 +724,7 @@ void CreateRAMFileInSD() {
 void outputNES() {
   display_Clear();
 
-  uint32_t prg_crc32;
+  uint32_t prg_crc32 = 0;
   File prg_crc32_file;
   if(prg_crc32_file.open(filePRG, O_READ))
   {
@@ -831,6 +831,11 @@ void CartFinish() {
 
 unsigned char* getNESHeaderForFileInfo(size_t prg_size, size_t chr_size, uint32_t prg_crc32, uint32_t chr_crc32)
 {
+  if(prg_size == 0)
+  {
+    return NULL;
+  }
+  
   File nesDb;
   char* temp_line;
   int i;