Tweaks space whales (#32011)

* Tweaks space whales

* Small adjustment

* Checks

* Lints

* Apply suggestion from @CRUNCH-Borg

Co-authored-by: CRUNCH <143041327+CRUNCH-Borg@users.noreply.github.com>
Signed-off-by: Burzah <116982774+Burzah@users.noreply.github.com>

---------

Signed-off-by: Burzah <116982774+Burzah@users.noreply.github.com>
Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>
Co-authored-by: CRUNCH <143041327+CRUNCH-Borg@users.noreply.github.com>

code/modules/mob/living/basic/hostile/megafauna/space_whale/space_whale.dm

@@ -22,8 +22,9 @@
 	pixel_x = -80
 	pixel_y = -96
 	faction = list("neutral", "whale")
+	weather_immunities = list("lava","ash", "burn", "rad")
 	step_type = FOOTSTEP_MOB_HEAVY
-	true_spawn = FALSE
+	internal_gps = /obj/item/gps/internal/space_whale
 	ai_controller = /datum/ai_controller/basic_controller/space_whale
 	innate_actions = list(
 		/datum/action/cooldown/mob_cooldown/space_whale/charge = BB_WHALE_CHARGE_ACTION)
@@ -57,3 +58,8 @@
 		if(harbringer == attacker) // Do not commit suicide attacking yourself
 			continue
 		harbringer.ai_controller.insert_blackboard_key_lazylist(BB_BASIC_MOB_RETALIATE_LIST, attacker)
+
+/obj/item/gps/internal/space_whale
+	icon_state = null
+	gpstag = "Whale Signal"
+	desc = "You hear the groaning call of the space whale."

code/modules/mob/living/basic/hostile/megafauna/space_whale/space_whale_ai.dm

@@ -11,7 +11,7 @@
 	max_target_distance = 15
 	planning_subtrees = list(
 		/datum/ai_planning_subtree/target_retaliate,
-		/datum/ai_planning_subtree/find_and_hunt_target/fish,
+		/datum/ai_planning_subtree/find_food,
 		/datum/ai_planning_subtree/simple_find_target,
 		/datum/ai_planning_subtree/targeted_mob_ability/whale_offensive_spellcasting,
 		/datum/ai_planning_subtree/attack_obstacle_in_path/walls,