Adds sifgrass floor tiles. Grass tiles spawn greengrass (#7714)

code/game/objects/items/stacks/tiles/fifty_spawner_tiles.dm

@@ -4,6 +4,10 @@
 	name = "stack of grass"
 	type_to_spawn = /obj/item/stack/tile/grass
 
+/obj/fiftyspawner/grass/sif
+	name = "stack of sifgrass"
+	type_to_spawn = /obj/item/stack/tile/grass/sif
+
 /obj/fiftyspawner/wood
 	name = "stack of wood"
 	type_to_spawn = /obj/item/stack/tile/wood

code/game/objects/items/stacks/tiles/tile_types.dm

@@ -41,6 +41,12 @@
 	no_variants = FALSE
 	drop_sound = 'sound/items/drop/herb.ogg'
 	pickup_sound = 'sound/items/pickup/herb.ogg'
+
+/obj/item/stack/tile/grass/sif
+	name = "sivian grass tile"
+	singular_name = "sivian grass floor tile"
+	desc = "A patch of grass like those that decorate the plains of Sif."
+
 /*
  * Wood
  */

code/game/turfs/flooring/flooring.dm

@@ -146,6 +146,7 @@ var/list/flooring_types
 	flags = TURF_REMOVE_SHOVEL
 	icon = 'icons/turf/outdoors.dmi'
 	icon_base = "grass_sif"
+	build_type = /obj/item/stack/tile/grass/sif
 	has_base_range = 1
 
 /decl/flooring/water