Sundry Runtime Fixes - March (#5047)

* Fixes Runtime in tools.dm,239: undefined variable /mob/living/simple_animal/retaliate/solargrub/var/handcuffed

* Add logging to help identify the cause of runtime in examining zshadow mobs.

* Fix Runtime in buckling.dm,165: Cannot execute null.forceMove().

* Fixes  Runtime in robot_items.dm,31: Cannot read null.origin_tech

* Fixes Runtime in paper_bundle.dm,183: Cannot read null.loc

code/modules/paperwork/paper_bundle.dm

@@ -164,7 +164,7 @@
 			usr.put_in_hands(W)
 			pages.Remove(pages[page])
 
-			usr << "<span class='notice'>You remove the [W.name] from the bundle.</span>"
+			to_chat(usr, "<span class='notice'>You remove the [W.name] from the bundle.</span>")
 
 			if(pages.len <= 1)
 				var/obj/item/weapon/paper/P = src[1]
@@ -178,11 +178,11 @@
 				page = pages.len
 
 			update_icon()
-	else
-		usr << "<span class='notice'>You need to hold it in hands!</span>"
-	if (src.loc && istype(src.loc, /mob) ||istype(src.loc.loc, /mob))
+
 		src.attack_self(usr)
 		updateUsrDialog()
+	else
+		to_chat(usr, "<span class='notice'>You need to hold it in hands!</span>")
 
 /obj/item/weapon/paper_bundle/verb/rename()
 	set name = "Rename bundle"