$OpenBSD: patch-ccstruct_matrix_h,v 1.1 2016/09/11 12:09:54 naddy Exp $

https://github.com/tesseract-ocr/tesseract/commit/4919b276ebde72782997787f424fd44122e2974e

--- ccstruct/matrix.h.orig	Tue Feb 16 22:27:01 2016
+++ ccstruct/matrix.h	Sun Sep 11 14:00:23 2016
@@ -30,7 +30,7 @@
 
 class BLOB_CHOICE_LIST;
 
-#define NOT_CLASSIFIED reinterpret_cast<BLOB_CHOICE_LIST*>(NULL)
+#define NOT_CLASSIFIED reinterpret_cast<BLOB_CHOICE_LIST*>(0)
 
 // A generic class to hold a 2-D matrix with entries of type T, but can also
 // act as a base class for other implementations, such as a triangular or
