Convert some bools to TRUE/FALSE instead of 1/0. (#11100)

Co-authored-by: Aronai Sieyes <arokha@arokha.com>

code/game/objects/structures/flora/flora_vr.dm

@@ -79,14 +79,14 @@
 	icon = 'icons/obj/flora/amayastuff.dmi'
 	desc = "Small stones sit beside this large boulder. Moss grows on the top of each of them."
 	icon_state = "bigboulder1"
-	density = 1
+	density = TRUE
 	
 /obj/structure/flora/bboulder2
 	name = "jagged large boulder"
 	icon = 'icons/obj/flora/amayastuff.dmi'
 	desc = "This boulder has had plates broken off it. Moss grows in the cracks and across the top."
 	icon_state = "bigboulder2"
-	density = 1
+	density = TRUE
 	
 /obj/structure/flora/rocks1
 	name = "rocks"

code/game/objects/structures/flora/grass.dm

@@ -2,7 +2,7 @@
 /obj/structure/flora/grass
 	name = "grass"
 	icon = 'icons/obj/flora/snowflora.dmi'
-	anchored = 1
+	anchored = TRUE
 
 /obj/structure/flora/grass/brown
 	icon_state = "snowgrass1bb"

code/game/objects/structures/flora/trees.dm

@@ -1,8 +1,8 @@
 //trees
 /obj/structure/flora/tree
 	name = "tree"
-	anchored = 1
-	density = 1
+	anchored = TRUE
+	density = TRUE
 	pixel_x = -16
 	plane = MOB_PLANE // You know what, let's play it safe.
 	layer = ABOVE_MOB_LAYER