Fix a compiling error on Mac

core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp

 // Copyright 2014 PDFium 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 <stdint.h>
 
 #include <limits>
 
 #include "codec_int.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 480 matching lines @@
   y.dx = 1;
   y.dy = 1;
   y.prec = 8;
   y.bpp = 8;
   opj_image_t img;
   memset(&img, 0, sizeof(img));
   img.numcomps = 3;
   img.color_space = OPJ_CLRSPC_SYCC;
   img.comps = FX_Alloc(opj_image_comp_t, 3);
   const struct {
-    int w;
+    OPJ_UINT32 w;
     bool expected;
   } cases[] = {{0, false},
                {1, false},
                {30, false},
                {31, true},
                {32, true},
                {33, true},
                {34, false},
                {UINT_MAX, false}};
   for (int i = 0; i < sizeof(cases) / sizeof(cases[0]); ++i) {
@@ skipping 21 matching lines @@
       EXPECT_NE(img.comps[0].h, img.comps[1].h);
       EXPECT_NE(img.comps[0].w, img.comps[2].w);
       EXPECT_NE(img.comps[0].h, img.comps[2].h);
     }
     FX_Free(img.comps[0].data);
     FX_Free(img.comps[1].data);
     FX_Free(img.comps[2].data);
   }
   FX_Free(img.comps);
 }