Bring back source line accidentally removed in r4217.

Review URL: http://codereview.chromium.org/1153008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4219 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/debug.cc

@@ -720,6 +720,7 @@ bool Debug::CompileDebuggerScript(int index) {
 
   // Mark this script as native and return successfully.
   Handle<Script> script(Script::cast(function->shared()->script()));
+  script->set_type(Smi::FromInt(Script::TYPE_NATIVE));
   return true;
 }