From 7ba42dff44d5a4acd3ed69f104861c34c6a13844 Mon Sep 17 00:00:00 2001
From: Nicholas Hastings <nshastings@gmail.com>
Date: Tue, 25 Apr 2017 21:46:07 -0400
Subject: [PATCH] Update IFileSystem.

---
 public/filesystem.h          | 2 ++
 public/filesystem_passthru.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/public/filesystem.h b/public/filesystem.h
index 0db0a8f2..a806f320 100644
--- a/public/filesystem.h
+++ b/public/filesystem.h
@@ -513,6 +513,8 @@ public:
 	// If there are currently no search paths with the specified path ID, then it will still
 	// remember it in case you add search paths with this path ID.
 	virtual void			MarkPathIDByRequestOnly( const char *pPathID, bool bRequestOnly ) = 0;
+	
+	virtual bool			BUnknown() = 0;
 
 	// converts a partial path into a full path
 	virtual const char		*RelativePathToFullPath( const char *pFileName, const char *pPathID, char *pLocalPath, int localPathBufferSize, PathTypeFilter_t pathFilter = FILTER_NONE, PathTypeQuery_t *pPathType = NULL ) = 0;
diff --git a/public/filesystem_passthru.h b/public/filesystem_passthru.h
index 8a589974..357cf0d4 100644
--- a/public/filesystem_passthru.h
+++ b/public/filesystem_passthru.h
@@ -276,6 +276,8 @@ public:
 		{ return m_pFileSystemPassThru->CheckVPKFileHash( PackFileID, nPackFileNumber, nFileFraction, md5Value ); }
 	virtual void			GetVPKFileStatisticsKV( KeyValues *pKV )
 		{ m_pFileSystemPassThru->GetVPKFileStatisticsKV( pKV ); }
+	
+	virtual bool			BUnknown() { return m_pFileSystemPassThru->BUnknown(); }
 
 protected:
 	IFileSystem *m_pFileSystemPassThru;