Fixes snow siding pathing. (#2440)

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## About The Pull Request
Fixes the pathing for the snow siding decals used on all of three maps.
It crashed my SDMM once so im fixing it. Maps affected by this are
updated to use the newly pathed decals. Also makes the surrounded snow
decal usable since the sprite was previously unused.
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## Why It's Good For The Game

![image](https://github.com/shiptest-ss13/Shiptest/assets/95449138/7b261aab-47b2-4773-941e-bdf56d5ef47e)
Previously was an incorrectly pathed decal that would crash SDMM if you
tried to generate its directions.
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## Changelog

:cl:
fix: Fixed snow siding decal pathing
add: Surrounded snow siding turf decal
/:cl:

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_maps/RandomRuins/IceRuins/icemoon_surface_engioutpost.dmm

@@ -1456,32 +1456,34 @@
 /area/ruin)
 "dA" = (
 /obj/effect/turf_decal/trimline/transparent/neutral/filled/line,
-/obj/effect/turf_decal/weather/snow/corner{
-	dir = 10
-	},
 /obj/machinery/atmospherics/components/unary/vent_scrubber/on/layer4{
 	dir = 1
 	},
+/obj/effect/turf_decal/weather/snow{
+	dir = 10
+	},
 /turf/open/floor/plasteel/dark{
 	initial_gas_mix = "ICEMOON_ATMOS"
 	},
 /area/ruin)
 "dB" = (
 /obj/effect/turf_decal/trimline/transparent/neutral/filled/line,
-/obj/effect/turf_decal/weather/snow/corner,
 /obj/machinery/atmospherics/pipe/simple/supply/hidden/layer2{
 	dir = 5
 	},
+/obj/effect/turf_decal/weather/snow,
 /turf/open/floor/plasteel/dark{
 	initial_gas_mix = "ICEMOON_ATMOS"
 	},
 /area/ruin)
 "dC" = (
 /obj/effect/turf_decal/trimline/transparent/neutral/filled/line,
-/obj/effect/turf_decal/weather/snow/corner,
 /obj/machinery/atmospherics/components/unary/vent_pump/on/layer2{
 	dir = 8
 	},
+/obj/effect/turf_decal/weather/snow{
+	dir = 6
+	},
 /turf/open/floor/plasteel/dark{
 	initial_gas_mix = "ICEMOON_ATMOS"
 	},

_maps/RandomRuins/SpaceRuins/provinggrounds.dmm

@@ -324,7 +324,6 @@
 /area/ruin/space/has_grav/syndicircle/winter)
 "iR" = (
 /obj/effect/mine/shrapnel,
-/obj/effect/turf_decal/weather/snow/corner,
 /obj/item/stack/tile/mineral/snow,
 /obj/machinery/light/dim/directional/west,
 /obj/effect/decal/cleanable/dirt/dust,

_maps/outpost/nanotrasen_asteroid.dmm

@@ -580,16 +580,13 @@
 	pixel_y = -3
 	},
 /obj/item/toy/plush/beeplushie,
-/obj/effect/turf_decal/weather/snow/corner{
-	dir = 5
-	},
-/obj/effect/turf_decal/weather/snow/corner{
-	dir = 6
-	},
 /obj/item/reagent_containers/food/drinks/mug/tea{
 	pixel_y = -14;
 	pixel_x = -4
 	},
+/obj/effect/turf_decal/weather/snow/surround{
+	dir = 4
+	},
 /turf/open/floor/plating/asteroid/snow/under/lit,
 /area/outpost/external)
 "cm" = (
@@ -998,7 +995,7 @@
 /area/outpost/maintenance/fore)
 "dO" = (
 /obj/effect/turf_decal/snow,
-/obj/effect/turf_decal/weather/snow/corner{
+/obj/effect/turf_decal/weather/snow{
 	dir = 8
 	},
 /turf/open/floor/concrete/reinforced,
@@ -3253,7 +3250,7 @@
 	pixel_y = 3;
 	pixel_x = -1
 	},
-/obj/effect/turf_decal/weather/snow/corner{
+/obj/effect/turf_decal/weather/snow{
 	dir = 9
 	},
 /turf/open/floor/plating/asteroid/snow/under/lit,
@@ -6619,7 +6616,7 @@
 /area/outpost/hallway/central)
 "xk" = (
 /obj/structure/bonfire/prelit,
-/obj/effect/turf_decal/weather/snow/corner{
+/obj/effect/turf_decal/weather/snow{
 	dir = 1
 	},
 /turf/open/floor/plating/asteroid/snow/under/lit,
@@ -9282,7 +9279,7 @@
 	pixel_y = 5;
 	pixel_x = 1
 	},
-/obj/effect/turf_decal/weather/snow/corner{
+/obj/effect/turf_decal/weather/snow{
 	dir = 10
 	},
 /turf/open/floor/plating/asteroid/snow/under/lit,
@@ -11618,13 +11615,13 @@
 /turf/open/floor/concrete/slab_3,
 /area/outpost/hallway/central)
 "Os" = (
-/obj/effect/turf_decal/weather/snow/corner{
-	dir = 6
-	},
 /obj/item/shovel,
 /obj/item/flashlight/lantern{
 	pixel_x = 7
 	},
+/obj/effect/turf_decal/weather/snow{
+	dir = 6
+	},
 /turf/open/floor/plating/asteroid/snow/under/lit,
 /area/outpost/external)
 "Ot" = (

code/game/objects/effects/decals/turfdecal/weather.dm

@@ -2,14 +2,14 @@
 	name = "sandy floor"
 	icon_state = "sandyfloor"
 
-/obj/effect/turf_decal/weather/snow
-	name = "snowy floor"
-	icon_state = "snowyfloor"
-
-/obj/effect/turf_decal/weather/snow/corner
-	name = "snow corner piece"
+/obj/effect/turf_decal/weather/snow //add a corner decal if you resprite this to look like the other sidings
+	name = "snow siding"
 	icon = 'icons/turf/snow.dmi'
-	icon_state = "snow_corner"
+	icon_state = "snow_side"
+
+/obj/effect/turf_decal/weather/snow/surround
+	name = "surround"
+	icon_state = "snow_surround"
 
 /obj/effect/turf_decal/weather/dirt
 	name = "dirt siding"