From 3e720fdd96acdc27cb6e3c2a7f353a00aaaa4784 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Tue, 14 Jan 2020 22:19:15 +0100
Subject: [PATCH] Added two more sanity checks into the FDI2RAW code.

---
 src/floppy/fdi2raw.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/floppy/fdi2raw.c b/src/floppy/fdi2raw.c
index ffb3c3a53..5cbbd9a0c 100644
--- a/src/floppy/fdi2raw.c
+++ b/src/floppy/fdi2raw.c
@@ -187,10 +187,14 @@ static uae_u8 temp, temp2;
 static uae_u8 *expand_tree (uae_u8 *stream, NODE *node)
 {
 	if (temp & temp2) {
-		fdi_free (node->left);
-		node->left = 0;
-		fdi_free (node->right);
-		node->right = 0;
+		if (node->left) {
+			fdi_free (node->left);
+			node->left = 0;
+		}
+		if (node->right) {
+			fdi_free (node->right);
+			node->right = 0;
+		}
 		temp2 >>= 1;
 		if (!temp2) {
 			temp = *stream++;