Make VisitStatements() consistent among all AstVisitor implementations

src/ast.cc

Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index 38c6dddf9495b1915c56f30bcc2d28cda7138312..873417119ccd197806f1ab86e632f202032f21fd 100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -708,7 +708,9 @@ void AstVisitor::VisitDeclarations(ZoneList<Declaration*>* declarations) {
 
 void AstVisitor::VisitStatements(ZoneList<Statement*>* statements) {
   for (int i = 0; i < statements->length(); i++) {
-    Visit(statements->at(i));
+    Statement* stmt = statements->at(i);
+    Visit(stmt);
+    if (stmt->IsJump()) break;
   }
 }