Fixed lint.

Removed one space added by Visual Studio.

TBR=ager@chromium.org
Review URL: http://codereview.chromium.org/55006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1628 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/debug.h

@@ -552,7 +552,7 @@ class Debugger {
 // seperate from the V8 thread.
 class DebugMessageThread: public Thread {
  public:
-   DebugMessageThread() : keep_running_(true) {}
+  DebugMessageThread() : keep_running_(true) {}
   virtual ~DebugMessageThread() {}
 
   // Main function of DebugMessageThread thread.