Fix water reagent making certain turfs slippery (#90590)

Co-authored-by: Jacquerel <hnevard@gmail.com>

code/__DEFINES/is_helpers.dm

@@ -36,6 +36,19 @@ GLOBAL_LIST_INIT(turfs_without_ground, typecacheof(list(
 
 #define isgroundlessturf(A) (is_type_in_typecache(A, GLOB.turfs_without_ground))
 
+GLOBAL_LIST_INIT(turfs_no_slip_water, typecacheof(list(
+	/turf/open/misc/asteroid,
+	/turf/open/misc/dirt,
+	/turf/open/misc/grass,
+	/turf/open/misc/basalt,
+	/turf/open/misc/ashplanet,
+	/turf/open/misc/snow,
+	/turf/open/misc/sandy_dirt,
+	/turf/open/floor/noslip,
+	)))
+
+#define isnoslipturf(A) (is_type_in_typecache(A, GLOB.turfs_no_slip_water))
+
 GLOBAL_LIST_INIT(turfs_openspace, typecacheof(list(
 	/turf/open/openspace,
 	/turf/open/space/openspace,

code/modules/reagents/chemistry/reagents/other_reagents.dm

@@ -251,16 +251,15 @@
 
 /datum/reagent/water/expose_turf(turf/open/exposed_turf, reac_volume)
 	. = ..()
+
 	if(!istype(exposed_turf))
 		return
 
-	var/cool_temp = cooling_temperature
-	if(reac_volume >= 5)
-		exposed_turf.MakeSlippery(TURF_WET_WATER, 10 SECONDS, min(reac_volume*1.5 SECONDS, 60 SECONDS))
-
 	for(var/mob/living/basic/slime/exposed_slime in exposed_turf)
 		exposed_slime.apply_water()
 
+	var/cool_temp = cooling_temperature
+
 	var/obj/effect/hotspot/hotspot = (locate(/obj/effect/hotspot) in exposed_turf)
 	if(hotspot && !isspaceturf(exposed_turf))
 		if(exposed_turf.air)
@@ -269,6 +268,12 @@
 			air.react(src)
 			qdel(hotspot)
 
+	if(isgroundlessturf(exposed_turf) || isnoslipturf(exposed_turf))
+		return
+
+	if(reac_volume >= 5)
+		exposed_turf.MakeSlippery(TURF_WET_WATER, 10 SECONDS, min(reac_volume*1.5 SECONDS, 60 SECONDS))
+
 /*
  * Water reaction to an object
  */