(svn r19479) -Codechange: Test range of town size and layout instead of against the current last value.

src/town_cmd.cpp

@@ -1525,8 +1525,8 @@ CommandCost CmdFoundTown(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
 	bool random = HasBit(p1, 6);
 	uint32 townnameparts = p2;
 
-	if (size > TSZ_RANDOM) return CMD_ERROR;
-	if (layout > TL_RANDOM) return CMD_ERROR;
+	if (size >= TSZ_END) return CMD_ERROR;
+	if (layout >= NUM_TLS) return CMD_ERROR;
 
 	/* Some things are allowed only in the scenario editor */
 	if (_game_mode != GM_EDITOR) {

src/town_type.h

@@ -23,6 +23,8 @@ enum TownSize {
 	TSZ_MEDIUM, ///< Medium town.
 	TSZ_LARGE,  ///< Large town.
 	TSZ_RANDOM, ///< Random size, bigger than small, smaller than large.
+
+	TSZ_END,    ///< Number of available town sizes.
 };
 
 enum {