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diff -up a2ps-4.14/lib/pathwalk.c.forward-null a2ps-4.14/lib/pathwalk.c
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--- a2ps-4.14/lib/pathwalk.c.forward-null	2011-08-10 16:06:53.185942197 +0100
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+++ a2ps-4.14/lib/pathwalk.c	2011-08-10 16:08:36.831030924 +0100
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@@ -348,12 +348,12 @@ xpw_find_included_file (char * const *pa
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     /* Relative.  Give its root. */
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     dir = dir_name (including_file);
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-  res = ALLOCA (char, (strlen (dir)
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+  res = ALLOCA (char, ((dir ? strlen (dir) : 0)
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 		       + strlen (name)
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 		       + (suffix ? strlen (suffix) : 0)
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 		       + 2));
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-  sprintf (res, "%s%c%s%s", dir, DIRECTORY_SEPARATOR,
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-	   name, suffix ? suffix : "");
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+  sprintf (res, "%s%c%s%s", dir ? dir : "", DIRECTORY_SEPARATOR,
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+	   dir ? name : name + 1, suffix ? suffix : "");
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   XFREE (dir);
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   if (stat (res, &statbuf) == 0)
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     return xstrdup (res);