(svn r2782) -Codechange: Started cleaning the bridge code. Removed numerous global variables containing bridge information and joined them in a struct. Introduced GetBridgeType and GetBridgePiece and fixed some minor stuff (whitespace etc)

bridge.h

@@ -0,0 +1,22 @@
+/* $Id: */
+
+/** @file bridge.h Header file for bridges */
+
+#ifndef BRIDGE_H
+#define BRIDGE_H
+
+/** Struct containing information about a single bridge type
+ */
+typedef struct Bridge {
+	byte avail_year;     ///< the year in which the bridge becomes available
+	byte min_length;     ///< the minimum length of the bridge (not counting start and end tile)
+	byte max_length;     ///< the maximum length of the bridge (not counting start and end tile)
+	uint16 price;        ///< the relative price of the bridge
+	uint16 speed;        ///< maximum travel speed
+	PalSpriteID sprite;  ///< the sprite which is used in the GUI (possibly with a recolor sprite)
+	StringID material;   ///< the string that contains the bridge description
+} Bridge;
+
+extern const Bridge _bridge[MAX_BRIDGES];
+
+#endif /* BRIDGE_H */