--- a/newgrf.h	Wed Nov 17 19:29:24 2004 +0000
+++ b/newgrf.h	Wed Nov 17 20:08:13 2004 +0000
@@ -1,32 +1,38 @@
-
-struct GRFFile {
-	char *filename;
-	uint32 grfid;
-	uint16 flags;
-	uint16 sprite_offset;
-	struct GRFFile *next;
-
-	/* A sprite group contains all sprites of a given vehicle (or multiple
-	 * vehicles) when carrying given cargo. It consists of several sprite
-	 * sets.  Group ids are refered as "cargo id"s by TTDPatch
-	 * documentation, contributing to the global confusion.
-	 *
-	 * A sprite set contains all sprites of a given vehicle carrying given
-	 * cargo at a given *stage* - that is usually its load stage. Ie. you
-	 * can have a spriteset for an empty wagon, wagon full of coal,
-	 * half-filled wagon etc.  Each spriteset contains eight sprites (one
-	 * per direction) or four sprites if the vehicle is symmetric. */
-
-	int spriteset_start;
-	int spriteset_numsets;
-	int spriteset_numents;
-	int spriteset_feature;
-
-	int spritegroups_count;
-	struct SpriteGroup *spritegroups;
-
-	struct StationSpec stations[256];
-};
-
-struct GRFFile *_first_grffile;
-int _grffile_count;
+#ifndef NEWGRF_H
+#define NEWGRF_H
+
+struct GRFFile {
+	char *filename;
+	uint32 grfid;
+	uint16 flags;
+	uint16 sprite_offset;
+	struct GRFFile *next;
+
+	/* A sprite group contains all sprites of a given vehicle (or multiple
+	 * vehicles) when carrying given cargo. It consists of several sprite
+	 * sets.  Group ids are refered as "cargo id"s by TTDPatch
+	 * documentation, contributing to the global confusion.
+	 *
+	 * A sprite set contains all sprites of a given vehicle carrying given
+	 * cargo at a given *stage* - that is usually its load stage. Ie. you
+	 * can have a spriteset for an empty wagon, wagon full of coal,
+	 * half-filled wagon etc.  Each spriteset contains eight sprites (one
+	 * per direction) or four sprites if the vehicle is symmetric. */
+
+	int spriteset_start;
+	int spriteset_numsets;
+	int spriteset_numents;
+	int spriteset_feature;
+
+	int spritegroups_count;
+	struct SpriteGroup *spritegroups;
+
+	struct StationSpec stations[256];
+};
+
+extern int _grffile_count;
+extern struct GRFFile *_first_grffile;
+
+
+#endif /* NEWGRF_H */
+