[PATCH] Fix for figlet

[PATCH] Fix for figlet

[Christoph Egger]

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Hello!

There's a fix for figlet, which prevents accessing a char[] array with a 
negative index.

The patch applies to xen/tools/figlet/figlet.c
The fix has been taken from the OpenBSD ports tree: 
http://www.openbsd.org/cgi-bin/cvsweb/ports/misc/figlet/patches/patch-figlet_c

It works for me.

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diff -r 2b8dc69744e3 xen/tools/figlet/figlet.c
--- a/xen/tools/figlet/figlet.c	Thu Sep 14 07:55:28 2006 +0100
+++ b/xen/tools/figlet/figlet.c	Wed Sep 13 19:12:28 2006 +0200
@@ -1448,8 +1448,9 @@ inchr c;
       }
     else {
       for (k=0;k<smushamount;k++) {
-        outputline[row][outlinelen-smushamount+k] =
-          smushem(outputline[row][outlinelen-smushamount+k],currchar[row][k]);
+        if (outlinelen-smushamount+k >= 0)
+          outputline[row][outlinelen-smushamount+k] =
+            smushem(outputline[row][outlinelen-smushamount+k],currchar[row][k]);
         }
       strcat(outputline[row],currchar[row]+smushamount);
       }

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