Merge pull request MicrosoftDocs#31 from VSChawathe/patch-4

Coding style

Author: Colin Robertson

docs/parallel/concrt/codesnippet/CPP/walkthrough-creating-a-dataflow-agent_7.cpp

@@ -188,7 +188,7 @@ class dataflow_agent : public agent
             // Set the sentinel event.
             received_sentinel.set();
          },
-         [](int value) { 
+         [](int value) -> bool { 
             return value == 0; 
          });
 
@@ -299,4 +299,4 @@ int wmain()
          << L" negative numbers."<< endl;
    wcout << L"There are " << df_agent.positives() 
          << L" positive numbers."<< endl;
-}
+}