fix (some) 64bit warnings -- size_t -> int

src/core/SkFontDescriptor.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkFontDescriptor.h"
 #include "SkStream.h"
 
 enum {
     // these must match the sfnt 'name' enums
     kFontFamilyName = 0x01,
     kFullName       = 0x04,
     kPostscriptName = 0x06,
 
     // These count backwards from 0xFF, so as not to collide with the SFNT
     // defines for names in its 'name' table.
     kFontFileName   = 0xFE,
     kSentinel       = 0xFF,
 };
 
 SkFontDescriptor::SkFontDescriptor(SkTypeface::Style style) {
     fStyle = style;
 }
 
 static void read_string(SkStream* stream, SkString* string) {
-    const uint32_t length = stream->readPackedUInt();
+    const uint32_t length = SkToU32(stream->readPackedUInt());
     if (length > 0) {
         string->resize(length);
         stream->read(string->writable_str(), length);
     }
 }
 
 static void write_string(SkWStream* stream, const SkString& string,
                          uint32_t id) {
     if (!string.isEmpty()) {
         stream->writePackedUInt(id);
@@ skipping 31 matching lines @@
 void SkFontDescriptor::serialize(SkWStream* stream) {
     stream->writePackedUInt(fStyle);
 
     write_string(stream, fFamilyName, kFontFamilyName);
     write_string(stream, fFullName, kFullName);
     write_string(stream, fPostscriptName, kPostscriptName);
     write_string(stream, fFontFileName, kFontFileName);
 
     stream->writePackedUInt(kSentinel);
 }