Fix problem in r4998. Initialize target of break and continue in fast smi loop on X64.

Review URL: http://codereview.chromium.org/2830033

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5001 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/codegen-x64.cc

@@ -1645,6 +1645,9 @@ void CodeGenerator::GenerateFastSmiLoop(ForStatement* node) {
   Visit(node->init());
 
   JumpTarget loop(JumpTarget::BIDIRECTIONAL);
+  // Set type and stack height of BreakTargets.
+  node->continue_target()->set_direction(JumpTarget::FORWARD_ONLY);
+  node->break_target()->set_direction(JumpTarget::FORWARD_ONLY);
 
   IncrementLoopNesting();
   loop.Bind();