From 38ac3c7b7d430b43f35fc846aee1e3fef084091f Mon Sep 17 00:00:00 2001
From: Relintai <relintai@protonmail.com>
Date: Sat, 10 Dec 2022 16:43:43 +0100
Subject: [PATCH] Stop parsing when input is GIF87a.

---
 game/addons/gif-importer/GIFReader.gd | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/game/addons/gif-importer/GIFReader.gd b/game/addons/gif-importer/GIFReader.gd
index 813e847..ec59859 100644
--- a/game/addons/gif-importer/GIFReader.gd
+++ b/game/addons/gif-importer/GIFReader.gd
@@ -17,6 +17,15 @@ func read(source_file):
 	file.close()
 	var pos = 0
 	# Header 'GIF89a'
+	
+	var sttr : String = ""
+	for i in range(6):
+		sttr += char(data[i])
+		
+	if (sttr != "GIF89a"):
+		print("Can only open GIF89a!")
+		return null
+	
 	pos = pos + 6
 	# Logical Screen Descriptor
 	var width = get_int(data, pos)