fs.Stats.size V8::Integer => V8::Number.

While VM::Integer::Value() offers an int64_t, V8::Integer::New() only
accepts an int32_t, truncating fs.Stat's size in BuildStatsObject().

I consider this a bug in V8, and we should move back to V8::Integer
when it gets a ctr that allows a int64_t. Until then, this work-around
should hold.

src/node.cc

@@ -928,7 +928,7 @@ Local<Object> BuildStatsObject(struct stat * s) {
   stats->Set(rdev_symbol, Integer::New(s->st_rdev));
 
   /* total size, in bytes */
-  stats->Set(size_symbol, Integer::New(s->st_size));
+  stats->Set(size_symbol, Number::New(s->st_size));
 
   /* blocksize for filesystem I/O */
   stats->Set(blksize_symbol, Integer::New(s->st_blksize));