Fix presubmit failure.

TBR=fschneider@chromium.org

Review URL: http://codereview.chromium.org/1563001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4308 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/flow-graph.cc

@@ -631,7 +631,7 @@ void InstructionPrinter::VisitAssignment(Assignment* expr) {
 
   // Print the left-hand side.
   Visit(expr->target());
-  if (var == NULL && prop == NULL) return; // Throw reference error.
+  if (var == NULL && prop == NULL) return;  // Throw reference error.
   PrintF(" = ");
   // For compound assignments, print the left-hand side again and the
   // corresponding binary operator.