Bluetooth: Simplify started check
am: 5ea487bdce

Change-Id: I8d4ae4b5c1fc96809600a32c1b91ebfee8a23e8e
diff --git a/bluetooth/1.0/default/async_fd_watcher.cc b/bluetooth/1.0/default/async_fd_watcher.cc
index a88aa27..287d007 100644
--- a/bluetooth/1.0/default/async_fd_watcher.cc
+++ b/bluetooth/1.0/default/async_fd_watcher.cc
@@ -41,12 +41,7 @@
   }
 
   // Start the thread if not started yet
-  int started = tryStartThread();
-  if (started != 0) {
-    return started;
-  }
-
-  return 0;
+  return tryStartThread();
 }
 
 int AsyncFdWatcher::ConfigureTimeout(