(svn r51) Yet another slope graphics fix

landscape.c

@@ -246,14 +246,17 @@ bool hasFoundation(TileInfo *ti, bool direction)
 {
 	bool south, other; // southern corner and east/west corner
 	uint slope = _tile_type_procs[ti->type]->get_slope_tileh_proc(ti);
-	south = ((ti->tileh) & 2) != (slope & 2);
+	uint tileh = ti->tileh;
+
+	if(slope==0 && slope!=tileh) tileh=15;
+	south = (tileh & 2) != (slope & 2);
 
 	if(direction)
-		other = ((ti->tileh) & 4) != (slope & 4);
+		other = (tileh & 4) != (slope & 4);
 	else
-		other = ((ti->tileh) & 1) != (slope & 1);
-
+		other = (tileh & 1) != (slope & 1);
 	return south || other;
+
 }
 
 void DrawFoundation(TileInfo *ti, uint f)

table/landscape_sprite.h

@@ -132,28 +132,32 @@ static const SpriteID _landscape_spriteindexes_3[] = {
 };
 
 
-/* Slope graphics indexes temperate climate */
+/* Slope graphics indexes temperate climate 
+Skip first 3 sprites and only load the proper set */
 static const SpriteID _slopes_spriteindexes_0[] = {
  0xfffe,  3,
  SPR_SLOPES_BASE, SPR_SLOPES_BASE+73,
  0xffff,
 };
 
-/* Slope graphics indexes arctic climate */
+/* Slope graphics indexes arctic climate
+Skip first 79 sprites and only load the proper set */
 static const SpriteID _slopes_spriteindexes_1[] = {
  0xfffe,  79,
  SPR_SLOPES_BASE, SPR_SLOPES_BASE+73,
  0xffff,
 };
 
-/* Slope graphics indexes tropical climate */
+/* Slope graphics indexes tropical climate 
+Skip first 155 sprites and only load the proper set */
 static const SpriteID _slopes_spriteindexes_2[] = {
  0xfffe,  155,
  SPR_SLOPES_BASE, SPR_SLOPES_BASE+73,
  0xffff,
 };
 
-/* Slope graphics indexes toyland climate */
+/* Slope graphics indexes toyland climate
+Skip first 231 sprites and only load the proper set */
 static const SpriteID _slopes_spriteindexes_3[] = {
  0xfffe,  231,
  SPR_SLOPES_BASE, SPR_SLOPES_BASE+73,