# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1532816261 -7200
# Node ID 69bc3144c2b7665b6cf8cd853015720de9fc213d
# Parent  e1db06a0cc6b2e917d732edbc1afc7b83e408372
util.serialization: Tighten up type checks

diff -r e1db06a0cc6b -r 69bc3144c2b7 util/serialization.lua
--- a/util/serialization.lua	Thu Jul 26 00:17:23 2018 +0200
+++ b/util/serialization.lua	Sun Jul 29 00:17:41 2018 +0200
@@ -151,9 +151,9 @@
 			elseif mt then
 				tag = mt.__type;
 			end
-			if fr then
+			if type(fr) == "function" then
 				t = fr(t);
-				if tag then
+				if type(tag) == "string" then
 					o[l], l = tag, l + 1;
 				end
 			end