Add missing bounds check in FixedArray::set for smis

R=svenpanne@chromium.org
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/7564010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8820 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects-inl.h

@@ -1612,6 +1612,7 @@ Object* FixedArray::get(int index) {
 
 void FixedArray::set(int index, Smi* value) {
   ASSERT(map() != HEAP->fixed_cow_array_map());
+  ASSERT(index >= 0 && index < this->length());
   ASSERT(reinterpret_cast<Object*>(value)->IsSmi());
   int offset = kHeaderSize + index * kPointerSize;
   WRITE_FIELD(this, offset, value);