Fix lineprocessor: compilation

Review URL: http://codereview.chromium.org/549086

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3656 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

samples/lineprocessor.cc

@@ -410,7 +410,7 @@ v8::Handle<v8::String> ReadLine() {
   char* res;
   {
     v8::Unlocker unlocker;
-    res = fgets(buffer, buffer_size, stdin);
+    res = fgets(buffer, kBufferSize, stdin);
   }
   if (res == NULL) {
     v8::Handle<v8::Primitive> t = v8::Undefined();