Fixed off-by-one assertion

rijnb · rijnb · commit a68d4d6b7619 · 2017-05-03T13:50:39.000+02:00
diff --git a/README.md b/README.md
@@ -1,5 +1,6 @@
 ﻿# Mapcode Library for C/C++
 
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/d2e3d7a469484bfd8b801ce94d3f1737)](https://www.codacy.com/app/rijnb/mapcode-cpp?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=mapcode-foundation/mapcode-cpp&amp;utm_campaign=Badge_Grade)
 [![License](http://img.shields.io/badge/license-APACHE2-blue.svg)]()
 
 **Copyright (C) 2014-2016 Stichting Mapcode Foundation (http://www.mapcode.com)**
diff --git a/mapcodelib/mapcoder.c b/mapcodelib/mapcoder.c
@@ -1130,7 +1130,7 @@ static void encodeAutoHeader(char *result, const EncodeRec *enc, const int m, co
     const int codexm = coDex(m);
     ASSERT(result);
     ASSERT(enc);
-    ASSERT((0 <= m) && (m <= MAPCODE_BOUNDARY_MAX));
+    ASSERT((1 <= m) && (m <= MAPCODE_BOUNDARY_MAX));
     ASSERT((0 <= extraDigits) && (extraDigits <= MAX_PRECISION_DIGITS));
 
     while (REC_TYPE(firstindex - 1) > 1 && coDex(firstindex - 1) == codexm) {
