Fixes lurker tail stab over ledges and window frames (#5160)

# About the pull request

Fixes lurker tail stab not being usable over window frames and ledges.

# Explain why it's good for the game
# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
fix: Lurker can tail jab over ledges and window frames.
/:cl:

code/modules/mob/living/carbon/xenomorph/abilities/lurker/lurker_powers.dm

@@ -208,7 +208,7 @@
 				xeno.visible_message(SPAN_XENOWARNING("\The [xeno] strikes the window with their tail!"), SPAN_XENOWARNING("We strike the window with our tail!"))
 				apply_cooldown(cooldown_modifier = 0.5)
 				return
-			if(current_structure.density)
+			if(current_structure.density && !current_structure.throwpass)
 				to_chat(xeno, SPAN_WARNING("There's something blocking us from striking!"))
 				return