(svn r19972) -Change: Use the md5sum from the previous save of the game for BaNaNaS instead of the initial (when the grf was added) md5sum from the gamelog. Neither method is 'better', but this way it is independent from the gamelog.

src/newgrf_config.h

@@ -86,6 +86,7 @@ struct GRFConfig : ZeroedMemoryAllocator {
 	~GRFConfig();
 
 	GRFIdentifier ident; ///< grfid and md5sum to uniquely identify newgrfs
+	uint8 original_md5sum[16]; ///< MD5 checksum of original file if only a 'compatible' file was loaded
 	char *filename;     ///< Filename - either with or without full path
 	char *name;         ///< NOSAVE: GRF name (Action 0x08)
 	char *info;         ///< NOSAVE: GRF info (author, copyright, ...) (Action 0x08)