Add a couple of parenthesis to improve readability and please certain

GCC version.

BUG=364
TBR=sgjesse@chromium.org
Review URL: http://codereview.chromium.org/118016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2083 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/debug.cc

@@ -2044,7 +2044,7 @@ void Debugger::NotifyMessageHandler(v8::DebugEvent event,
   // in the queue if any. For script collected events don't even process
   // messages in the queue as the execution state might not be what is expected
   // by the client.
-  if (auto_continue && !HasCommands() || event == v8::ScriptCollected) {
+  if ((auto_continue && !HasCommands()) || event == v8::ScriptCollected) {
     return;
   }