Revert "12/21 modernizations from TG live"

code/modules/mob/mob_transformation_simple.dm

@@ -4,8 +4,8 @@
 //Note that this proc does NOT do MMI related stuff!
 /mob/proc/change_mob_type(new_type = null, turf/location = null, new_name = null as text, delete_old_mob = 0 as num)
 
-	if(isnewplayer(src))
-		usr << "<span class='danger'>Cannot convert players who have not entered yet.</span>"
+	if(istype(src,/mob/new_player))
+		usr << "<span class='danger'>cannot convert players who have not entered yet.</span>"
 		return
 
 	if(!new_type)
@@ -18,8 +18,8 @@
 		usr << "Invalid type path (new_type = [new_type]) in change_mob_type(). Contact a coder."
 		return
 
-	if(ispath(new_type, /mob/new_player))
-		usr << "<span class='danger'>Cannot convert into a new_player mob type.</span>"
+	if( new_type == /mob/new_player )
+		usr << "<span class='danger'>cannot convert into a new_player mob type.</span>"
 		return
 
 	var/mob/M
@@ -50,7 +50,7 @@
 		client.prefs.copy_to(H)
 		H.dna.update_dna_identity()
 
-	if(mind && isliving(M))
+	if(mind && istype(M, /mob/living))
 		mind.transfer_to(M, 1) // second argument to force key move to new mob
 	else
 		M.key = key