Intrepid Cockpit Fix (#19108)

Fixes being unable to access the Intrepid's copilot chairs, outside of
climbing over the back of them.

This was due to the window present on their tile not checking for
density, despite being specifically modified to allow passage.

code/game/objects/structures/window.dm

@@ -170,7 +170,7 @@
 	if(istype(mover) && mover.checkpass(PASSGLASS))
 		return 1
 	if(is_full_window())
-		return 0	//full tile window, you can't move into it!
+		return !density	//full tile window, you can't move into it if it's solid!
 	if(get_dir(loc, target) & dir)
 		return !density
 	else