From: Simon Tatham <anakin@pobox.com>
Date: Wed, 8 Dec 2004 09:37:57 +0000 (+0000)
Subject: Bah; r4954 introduced an array overrun.
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=b18c86241d42a0389dd6f9f7441e9cdd2bc7be06;p=sgt-puzzles.git

Bah; r4954 introduced an array overrun.

[originally from svn r4955]
[r4954 == 47e9419452a9fca895f1c84412ab1040d1aa86a5]
---

diff --git a/pattern.c b/pattern.c
index ca71fba..e7b99b3 100644
--- a/pattern.c
+++ b/pattern.c
@@ -330,7 +330,7 @@ int compute_rowdata(int *ret, unsigned char *start, int len, int step)
             i += runlen;
         }
 
-        if (start[i*step] == GRID_UNKNOWN)
+        if (i < len && start[i*step] == GRID_UNKNOWN)
             return -1;
     }