From 3e7b0c29165114d543669bb00793920412f37c08 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Mon, 2 Jun 2014 10:44:29 +0300
Subject: [PATCH] Fix crash when GL nodes file cannot be opened for writing

Report errors to console if nodes file cannot be opened or written
---
 src/p_glnodes.cpp | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/p_glnodes.cpp b/src/p_glnodes.cpp
index a8fa04c34..e59f3859a 100644
--- a/src/p_glnodes.cpp
+++ b/src/p_glnodes.cpp
@@ -1168,8 +1168,21 @@ static void CreateCachedNodes(MapData *map)
 
 	FString path = CreateCacheName(map, true);
 	FILE *f = fopen(path, "wb");
-	fwrite(compressed, 1, outlen+offset, f);
-	fclose(f);
+
+	if (f != NULL)
+	{
+		if (fwrite(compressed, outlen+offset, 1, f) != 1)
+		{
+			Printf("Error saving nodes to file %s\n", path.GetChars());
+		}
+
+		fclose(f);
+	}
+	else
+	{
+		Printf("Cannot open nodes file %s for writing\n", path.GetChars());
+	}
+
 	delete [] compressed;
 }