Second wave of Win64 warning cleanup

src/images/SkImageDecoder_libwebp.cpp

 /*
  * Copyright 2010, The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
@@ skipping 224 matching lines @@
     if (MODE_LAST == mode) {
         return false;
     }
 
     if (0 == WebPInitDecoderConfig(config)) {
         return false;
     }
 
     config->output.colorspace = mode;
     config->output.u.RGBA.rgba = (uint8_t*)decodedBitmap->getPixels();
-    config->output.u.RGBA.stride = decodedBitmap->rowBytes();
+    config->output.u.RGBA.stride = (int) decodedBitmap->rowBytes();
     config->output.u.RGBA.size = decodedBitmap->getSize();
     config->output.is_external_memory = 1;
 
     if (width != decodedBitmap->width() || height != decodedBitmap->height()) {
         config->options.use_scaling = 1;
         config->options.scaled_width = decodedBitmap->width();
         config->options.scaled_height = decodedBitmap->height();
     }
 
     return true;
@@ skipping 337 matching lines @@
     return SkImageDecoder::kUnknown_Format;
 }
 
 static SkImageEncoder* sk_libwebp_efactory(SkImageEncoder::Type t) {
       return (SkImageEncoder::kWEBP_Type == t) ? SkNEW(SkWEBPImageEncoder) : NULL;
 }
 
 static SkImageDecoder_DecodeReg gDReg(sk_libwebp_dfactory);
 static SkImageDecoder_FormatReg gFormatReg(get_format_webp);
 static SkImageEncoder_EncodeReg gEReg(sk_libwebp_efactory);