From f132dfe4d46b4b3d695c0a4b756c52d075696413 Mon Sep 17 00:00:00 2001
From: Enno Rehling <enno.rehling@gmail.com>
Date: Sun, 12 Feb 2017 19:57:02 +0100
Subject: [PATCH] bug 2282: Datenfile 2012 kaputt. make the reader for at_keys
 accept that sometimes, there are 0 keys.

---
 src/attributes/key.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/attributes/key.c b/src/attributes/key.c
index 0b252e0c0..ae15a38e3 100644
--- a/src/attributes/key.c
+++ b/src/attributes/key.c
@@ -38,7 +38,10 @@ static void a_writekeys(const attrib *a, const void *o, storage *store) {
 static int a_readkeys(attrib * a, void *owner, gamedata *data) {
     int i, *p = 0;
     READ_INT(data->store, &i);
-    assert(i < 4096 && i>0);
+    assert(i < 4096 && i>=0);
+    if (i == 0) {
+        return AT_READ_FAIL;
+    }
     a->data.v = p = malloc(sizeof(int)*(i + 1));
     *p++ = i;
     while (i--) {