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-rw-r--r--util/dataforms.lua2
1 files changed, 1 insertions, 1 deletions
diff --git a/util/dataforms.lua b/util/dataforms.lua
index b69df819..d4a1865c 100644
--- a/util/dataforms.lua
+++ b/util/dataforms.lua
@@ -252,7 +252,7 @@ field_readers["boolean"] =
field_verifiers["boolean"] =
function (data, field_tag, required)
data = field_readers["text-single"](field_tag);
- if #data == 0 and required then
+ if ((not data) or (#data == 0)) and required then
return "Required value missing";
end
if data ~= "1" and data ~= "true" and data ~= "0" and data ~= "false" then