Fix Win compilation issue introduced in r8081.

src/runtime.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5091 matching lines @@
     Isolate* isolate,
     SinkChar* write_cursor,
     Vector<const SourceChar> characters) {
   const SourceChar* read_cursor = characters.start();
   const SourceChar* end = read_cursor + characters.length();
   *(write_cursor++) = '"';
   while (read_cursor < end) {
     SourceChar c = *(read_cursor++);
     if (sizeof(SourceChar) > 1u &&
         static_cast<unsigned>(c) >= kQuoteTableLength) {
-      *(write_cursor++) = c;
+      *(write_cursor++) = static_cast<SinkChar>(c);

[Rico, 2011/05/26 14:42:09]

Well actually, consider making a comment why this always goes well

     } else {
       int len = JsonQuoteLengths[static_cast<unsigned>(c)];
       const char* replacement = JsonQuotes +
           static_cast<unsigned>(c) * kJsonQuotesCharactersPerEntry;
       write_cursor[0] = replacement[0];
       if (len > 1) {
         write_cursor[1] = replacement[1];
         if (len > 2) {
           ASSERT(len == 6);
           write_cursor[2] = replacement[2];
@@ skipping 7200 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal