Add second fileState to avoid incorrect detection of local modifications

Change-Id: I80fa339ca8922dfb8ca7511a7279fdacb0358c77
diff --git a/src/dispatcher.h b/src/dispatcher.h
index d3b6bc3..d5c0f30 100644
--- a/src/dispatcher.h
+++ b/src/dispatcher.h
@@ -165,6 +165,7 @@
   SyncLogPtr   m_syncLog;
   ActionLogPtr m_actionLog;
   FileStatePtr m_fileState;
+  FileStatePtr m_fileStateCow;
 
   boost::filesystem::path m_rootDir;
   Executor m_executor;