Updating to new OTS repo from https://github.com/khaledhosny/ots.git

src/cvt.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cvt.h"
 
 // cvt - Control Value Table
-// http://www.microsoft.com/opentype/otspec/cvt.htm
+// http://www.microsoft.com/typography/otspec/cvt.htm
+
+#define TABLE_NAME "cvt"
 
 namespace ots {
 
 bool ots_cvt_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
   Buffer table(data, length);
 
   OpenTypeCVT *cvt = new OpenTypeCVT;
   file->cvt = cvt;
 
   if (length >= 128 * 1024u) {
-    return OTS_FAILURE();  // almost all cvt tables are less than 4k bytes.
+    return OTS_FAILURE_MSG("Length (%d) > 120K");  // almost all cvt tables are less than 4k bytes.
   }
 
   if (length % 2 != 0) {
-    return OTS_FAILURE();
+    return OTS_FAILURE_MSG("Uneven cvt length (%d)", length);
   }
 
   if (!table.Skip(length)) {
-    return OTS_FAILURE();
+    return OTS_FAILURE_MSG("Length too high");
   }
 
   cvt->data = data;
   cvt->length = length;
   return true;
 }
 
 bool ots_cvt_should_serialise(OpenTypeFile *file) {
   if (!file->glyf) {
     return false;  // this table is not for CFF fonts.
   }
-  return g_transcode_hints && file->cvt;
+  return file->cvt;
 }
 
 bool ots_cvt_serialise(OTSStream *out, OpenTypeFile *file) {
   const OpenTypeCVT *cvt = file->cvt;
 
   if (!out->Write(cvt->data, cvt->length)) {
-    return OTS_FAILURE();
+    return OTS_FAILURE_MSG("Failed to write CVT table");
   }
 
   return true;
 }
 
 void ots_cvt_free(OpenTypeFile *file) {
   delete file->cvt;
 }
 
 }  // namespace ots
+
+#undef TABLE_NAME