win: Fix pipe leak on connection

util/win/exception_handler_server.cc

Index: util/win/exception_handler_server.cc
diff --git a/util/win/exception_handler_server.cc b/util/win/exception_handler_server.cc
index 2d702f20d0627a18a54597197b77c3920b015279..dbe790e12173aef0ad2117957c306ce22be21eec 100644
--- a/util/win/exception_handler_server.cc
+++ b/util/win/exception_handler_server.cc
@@ -211,6 +211,7 @@ void ExceptionHandlerServer::Run(Delegate* delegate,
                         512,
                         0,
                         nullptr);
+    PCHECK(pipe != INVALID_HANDLE_VALUE) << "CreateNamedPipe";
 
     // Ownership of this object (and the pipe instance) is given to the new
     // thread. We close the thread handles at the end of the scope. They clean