[OTS] Fix WOFF2 decode error

src/woff2.cc

 // Copyright (c) 2013 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.
 
 // This is the implementation of decompression of the proposed WOFF Ultra
 // Condensed file format.
 
 #include <cassert>
 #include <cstdlib>
 #include <vector>
@@ skipping 638 matching lines @@
             glyf_dst, glyf_dst_size, &glyph_size)) {
         return OTS_FAILURE();
       }
     } else {
       glyph_size = 0;
     }
     loca_values.push_back(loca_offset);
     if (glyph_size + 3 < glyph_size) {
       return OTS_FAILURE();
     }
-    glyph_size = ots::Round4(glyph_size);
+    glyph_size = ots::Round2(glyph_size);
     if (glyph_size > dst_size - loca_offset) {
       // This shouldn't happen, but this test defensively maintains the
       // invariant that loca_offset <= dst_size.
       return OTS_FAILURE();
     }
     loca_offset += glyph_size;
   }
   loca_values.push_back(loca_offset);
   assert(loca_values.size() == static_cast<size_t>(num_glyphs + 1));
   if (!ProcessBboxStream(&bbox_stream, num_glyphs, loca_values,
@@ skipping 358 matching lines @@
       if (transform_buf > &uncompressed_buf[uncompressed_buf.size()]) {
         return OTS_FAILURE();
       }
     }
   }
 
   return FixChecksums(tables, result);
 }
 
 }  // namespace ots