util.datamapper: Fix error on attempt to coerce nil to something
Turns falsy values into nil instead of nothing, which ensures this
function always has 1 return value, or table.insert({}) complains. Would
still happen on some unexpected input, but that's actually a good thing.
--- a/teal-src/util/datamapper.tl Tue Mar 23 21:52:07 2021 +0100
+++ b/teal-src/util/datamapper.tl Tue Mar 23 23:55:33 2021 +0100
@@ -37,6 +37,7 @@
end
local function totype(t : json_type_name, s : string) : any
+ if not s then return nil end
if t == "string" then
return s;
elseif t == "boolean" then
--- a/util/datamapper.lua Tue Mar 23 21:52:07 2021 +0100
+++ b/util/datamapper.lua Tue Mar 23 23:55:33 2021 +0100
@@ -13,6 +13,9 @@
end
local function totype(t, s)
+ if not s then
+ return nil
+ end
if t == "string" then
return s
elseif t == "boolean" then