Fix Mermaid Water Tiles

## About The Pull Request
Fixes mermaid AI. Mermaid on spawn is placed on deep water tiles that are labeled as dense but coded to be non dense in order to force mobs to avoid them. Mermaids AI thinks that she is in a 3by3 wall due to this. I changed obsessing water subtype to nondense. to fix this.
## Changelog
:cl:
tweak: obsessing water is now non dense.
/:cl:

ModularTegustation/fishing/code/turfs.dm

@@ -331,9 +331,6 @@
 		/obj/item/food/fish/emulsijack = 5,
 	)
 
-/turf/open/water/deep/polluted/ObjSink(atom/movable/sinkin_thing)
-	return TRUE
-
 /* Change this later so that it is not a subtype since the variable is in the deep type.
 	Safe subtype isnt nessesary since it pre sets safe to TRUE when we can just set it to
 	true individually.-IP*/
@@ -342,14 +339,18 @@
  * Safe turfs, they wont sink you when you enter them
  */
 
+/turf/open/water/deep/saltwater
+	density = FALSE
+
 /turf/open/water/deep/saltwater/safe/IsSafe()
 	return TRUE
 
 /turf/open/water/deep/obsessing_water
-	safe = TRUE
 	name = "Obsessing water"
 	desc = "A strange black and teal water."
 	icon_state = "obsessing_water"
+	safe = TRUE
+	density = FALSE
 	loot_level1 = list(
 		/obj/item/stack/sheet/mineral/wood = 30,
 		/obj/item/food/grown/harebell = 35,

lobotomy-corp13.dme

@@ -2373,8 +2373,8 @@
 #include "code\modules\jobs\job_types\city\civilian.dm"
 #include "code\modules\jobs\job_types\city\doctor.dm"
 #include "code\modules\jobs\job_types\city\HHPP.dm"
-#include "code\modules\jobs\job_types\city\rat.dm"
 #include "code\modules\jobs\job_types\city\prosthetic.dm"
+#include "code\modules\jobs\job_types\city\rat.dm"
 #include "code\modules\jobs\job_types\city\workshop.dm"
 #include "code\modules\jobs\job_types\city\fixer\east.dm"
 #include "code\modules\jobs\job_types\city\fixer\north.dm"