Validate MessageHeader before using

mojo/public/cpp/bindings/lib/connector.cc

Index: mojo/public/cpp/bindings/lib/connector.cc
diff --git a/mojo/public/cpp/bindings/lib/connector.cc b/mojo/public/cpp/bindings/lib/connector.cc
index 319631cbdf8cc8c0d281c2d3c9d8ed7ba4377e76..17f960442fee36f2ff31c9db129f0512babc4321 100644
--- a/mojo/public/cpp/bindings/lib/connector.cc
+++ b/mojo/public/cpp/bindings/lib/connector.cc
@@ -114,12 +114,14 @@ void Connector::ReadMore() {
   while (true) {
     MojoResult rv;
 
-    rv = ReadAndDispatchMessage(message_pipe_.get(), incoming_receiver_, NULL);
+    bool receiver_result;
+    rv = ReadAndDispatchMessage(message_pipe_.get(), incoming_receiver_,
+                                &receiver_result);
     if (rv == MOJO_RESULT_SHOULD_WAIT) {
       WaitToReadMore();
       break;
     }
-    if (rv != MOJO_RESULT_OK) {
+    if (rv != MOJO_RESULT_OK || !receiver_result) {
       error_ = true;
       break;
     }