engine: fix windows dedicated build

engine/matsys_interface.cpp

@@ -269,6 +269,8 @@ static const char *s_pRegistryConVars[] =
 static CThreadMutex g_VideoConfigMutex;
 #endif
 
+#ifndef DEDICATED
+
 static int ReadVideoConfigInt( const char *pName, int nDefault )
 {
 #if USE_VIDEOCONFIG_FILE
@@ -379,6 +381,8 @@ static void WriteVideoConfigString( const char *pName, const char *pString )
 #endif
 }
 
+#endif
+
 //-----------------------------------------------------------------------------
 // Scan for video config convars which are overridden on the cmd line, used
 // for development and automated timedemo regression testing.
@@ -685,6 +689,7 @@ static void OverrideMaterialSystemConfigFromCommandLine( MaterialSystem_Config_t
 //-----------------------------------------------------------------------------
 void OverrideMaterialSystemConfig( MaterialSystem_Config_t &config )
 {
+#ifndef DEDICATED
 	// enable/disable flashlight support based on mod (user can also set this explicitly)
 	// FIXME: this is only here because dxsupport_override.cfg is currently broken
 	ConVarRef mat_supportflashlight( "mat_supportflashlight" );
@@ -718,7 +723,8 @@ void OverrideMaterialSystemConfig( MaterialSystem_Config_t &config )
 		WriteVideoConfigInt( "ScreenWindowed", 1 );
 		config.SetFlag( MATSYS_VIDCFG_FLAGS_WINDOWED, true );
 	}
-}	
+#endif
+}
 
 
 void HandleServerAllowColorCorrection()