(svn r9676) -Codechange: introduce NUM_INDUSTRYTYPES instead of IT_END.

This makes the code clearer.

src/industry.h

@@ -13,6 +13,7 @@ typedef uint8 IndustryType;
 
 enum {
 	INVALID_INDUSTRY = 0xFFFF,
+	NUM_INDUSTRYTYPES = 37,
 	INDUTILE_NOANIM = 0xFF,        ///< flag to mark industry tiles as having no animation
 };