Turn on warnings as errors for (most) third_party code on Windows

third_party/qcms/qcms.gyp

 # Copyright (c) 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'qcms',
       'product_name': 'qcms',
       'type': '<(library)',
       'sources': [
         'src/chain.c',
         'src/chain.h',
         'src/iccread.c',
         'src/matrix.c',
         'src/matrix.h',
         'src/qcms.h',
         'src/qcmsint.h',
         'src/qcmstypes.h',
         'src/transform.c',
         'src/transform_util.c',
         'src/transform_util.h',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           './src',
         ],
       },
+      # Warning (sign-conversion) fixed upstream by large refactoring. Can be
+      # removed on next roll.
+      'msvs_disabled_warnings': [ 4018 ],
       'conditions': [
         [ 'target_arch != "arm" and OS in ["linux", "freebsd", "openbsd", "solaris"]', {
           'cflags': [
             '-msse',
             '-msse2',
           ],
         }],
         [ 'target_arch != "arm"', {
           'sources': [
             'src/transform-sse1.c',
             'src/transform-sse2.c',
           ],
         }],
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: