diona floor fixes (#8177)

code/modules/mob/living/carbon/alien/diona/diona_powers.dm

@@ -416,7 +416,7 @@
 				qdel(O)
 		var/structure_path = diona_structures[chosen_structure]
 		var/turf/T = get_turf(src)
-		if(isturf(structure_path))
+		if(ispath(structure_path, /turf))
 			T.ChangeTurf(structure_path)
 		else
-			new structure_path(T)
+			new structure_path(T)

html/changelogs/geeves-dionae_floor_fixes.yml

@@ -0,0 +1,6 @@
+author: Geeves
+
+delete-after: True
+
+changes: 
+  - bugfix: "Dionae structures now correctly assume the lighting of their surroundings."