--- a/src/newgrf_config.h	Sat Oct 06 21:16:00 2007 +0000
+++ b/src/newgrf_config.h	Mon Dec 03 23:39:38 2007 +0000
@@ -15,6 +15,7 @@
 	GCF_COMPATIBLE,///< GRF file does not exactly match the requested GRF (different MD5SUM), but grfid matches)
 	GCF_COPY,      ///< The data is copied from a grf in _all_grfs
 	GCF_INIT_ONLY, ///< GRF file is processed up to GLS_INIT
+	GCF_RESERVED,  ///< GRF file passed GLS_RESERVE stage
 };
 
 enum GRFStatus {
@@ -57,6 +58,8 @@
 	uint8 num_params;
 
 	struct GRFConfig *next;
+
+	bool IsOpenTTDBaseGRF() const;
 };
 
 /* First item in list of all scanned NewGRFs */