Even more win64 warning fixes

src/images/SkImageDecoder_libico.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkImageDecoder.h"
 #include "SkStream.h"
@@ skipping 211 matching lines @@
     }
 
     //these should all be zero, but perhaps are not - need to check
     //int compression = read4Bytes(buf, offset+16);       //0
     //int imageSize = read4Bytes(buf, offset+20);         //0 - sometimes has a value
     //int xPixels = read4Bytes(buf, offset+24);           //0
     //int yPixels = read4Bytes(buf, offset+28);           //0
     //int colorsUsed = read4Bytes(buf, offset+32)         //0 - might have an actual value though
     //int colorsImportant = read4Bytes(buf, offset+36);   //0
 
-    int begin = offset + 40;
+    int begin = SkToInt(offset + 40);
     //this array represents the colortable
     //if i allow other types of bitmaps, it may actually be used as a part of the bitmap
     SkPMColor* colors = NULL;
     int blue, green, red;
     if (colorCount)
     {
         colors = new SkPMColor[colorCount];
         for (int j = 0; j < colorCount; j++)
         {
             //should this be a function - maybe a #define?
@@ skipping 181 matching lines @@
 static SkImageDecoder_DecodeReg gReg(sk_libico_dfactory);
 
 static SkImageDecoder::Format get_format_ico(SkStreamRewindable* stream) {
     if (is_ico(stream)) {
         return SkImageDecoder::kICO_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 
 static SkImageDecoder_FormatReg gFormatReg(get_format_ico);