Fix the lint error.

src/runtime.cc

Index: src/runtime.cc
===================================================================
--- src/runtime.cc	(revision 628)
+++ src/runtime.cc	(working copy)
@@ -4009,7 +4009,7 @@
   void visit(uint32_t i, Handle<Object> elm) {
     uint32_t index = i + index_offset_;
     if (index >= index_limit_) return;
- 
+
     if (fast_elements_) {
       ASSERT(index < static_cast<uint32_t>(storage_->length()));
       storage_->set(index, *elm);