Pylon succ bugfix (#2010)

Just fixes a small reported issue with pylons, where a ventcrawling creature could get dragged out of the pipe network and stuck under the floor. Adds some safety checks to the sucking mechanic

code/game/gamemodes/cult/cult_structures.dm

@@ -273,7 +273,7 @@
 		//If the sacrifice was deleted somehow, we cant know exactly what happened. We'll assume it escaped
 		.=-1
 
-	else if(get_dist(src, sacrifice) > 5)
+	else if(get_dist(src, get_turf(sacrifice)) > 5)
 		//If the sacrifice gets more than 5 tiles away, it has escaped
 		.=-1
 	else if (sacrifice.stat == DEAD)
@@ -290,7 +290,11 @@
 			if (sacrifice)
 				walk_to(sacrifice,0)
 		else
-			walk_towards(sacrifice,src, 10)
+			if (istype(sacrifice.loc, /turf) && !(sacrifice.is_ventcrawling) && !(sacrifice.buckled))
+				//Suck the creature towards the pylon if possible
+				walk_towards(sacrifice,src, 10)
+			else
+				walk_to(sacrifice,0) //If we're not in a valid situation, cancel walking to prevent bugginess
 
 /obj/structure/cult/pylon/proc/finalize_sacrifice()
 	sacrifice.visible_message(span("danger","\The [sacrifice]'s physical form unwinds as its soul is extracted from the remains, and drawn into the pylon!"))

html/changelogs/Nanako-Pylonsuck.yml

@@ -0,0 +1,36 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#################################
+
+# Your name.  
+author: Nanako
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - bugfix: "Fixed some issues where creatures being sacrificed to pylons could bug out."