Second wave of Win64 warning cleanup

src/images/SkJpegUtility.cpp

 /*
  * Copyright 2010 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 "SkJpegUtility.h"
 
@@ skipping 51 matching lines @@
 #endif
     src->next_input_byte = (const JOCTET*)src->fBuffer;
     src->bytes_in_buffer = bytes;
     return TRUE;
 }
 
 static void sk_skip_input_data(j_decompress_ptr cinfo, long num_bytes) {
     skjpeg_source_mgr*  src = (skjpeg_source_mgr*)cinfo->src;
 
     if (num_bytes > (long)src->bytes_in_buffer) {
-        long bytesToSkip = num_bytes - src->bytes_in_buffer;
+        size_t bytesToSkip = num_bytes - src->bytes_in_buffer;
         while (bytesToSkip > 0) {
-            long bytes = (long)src->fStream->skip(bytesToSkip);
+            size_t bytes = src->fStream->skip(bytesToSkip);
             if (bytes <= 0 || bytes > bytesToSkip) {
 //              SkDebugf("xxxxxxxxxxxxxx failure to skip request %d returned %d\n", bytesToSkip, bytes);
                 cinfo->err->error_exit((j_common_ptr)cinfo);
                 return;
             }
 #ifdef SK_BUILD_FOR_ANDROID
             src->current_offset += bytes;
 #endif
             bytesToSkip -= bytes;
         }
@@ skipping 76 matching lines @@
 void skjpeg_error_exit(j_common_ptr cinfo) {
     skjpeg_error_mgr* error = (skjpeg_error_mgr*)cinfo->err;
 
     (*error->output_message) (cinfo);
 
     /* Let the memory manager delete any temp files before we die */
     jpeg_destroy(cinfo);
 
     longjmp(error->fJmpBuf, -1);
 }