(svn r10127) -Add: Addition of basic structure for industry tiles callbacks (unfinished).

-Codechange: ResolverObject receives member gfx, making it compatible for both industries and industry tiles
-Codechange: NewIndustryResolver now has his randombits and triggers (even if not implemented)

src/newgrf_spritegroup.h

@@ -200,6 +200,7 @@ struct ResolverObject {
 		struct {
 			TileIndex tile;
 			Industry *ind;
+			IndustryGfx gfx;
 		} industry;
 		struct {
 			const struct CargoSpec *cs;