Fix property when default value is false

Author: gilzoide

src/cache_lua_libs.lua

@@ -66,3 +66,14 @@ local ERROR_PATH_LINE_MESSAGE_PATT = '"([^"]+)"[^:]*:(%d*):%s*(.*)'
 local function string_quote(s)
 	return string_format('%q', s)
 end
+
+local function first_index_not_nil(obj, ...)
+	for i = 1, select('#', ...) do
+		local index = select(i, ...)
+		local value = obj[index]
+		if value ~= nil then
+			return value
+		end
+	end
+	return nil
+end

src/pluginscript_class_metadata.lua

@@ -224,7 +224,7 @@ function property(metadata)
 		default_value = metadata
 		property_type = get_property_type(metadata)
 	else
-		default_value = metadata.default_value or metadata.default or metadata[1]
+		default_value = first_index_not_nil(metadata, 'default_value', 'default', 1)
 		local explicit_type = metadata.type or metadata[2]
 		if is_class_wrapper(explicit_type) then
 			assert(explicit_type:inherits('Resource'), string_format("Only classes based on Resource are supported as property types, found %q", explicit_type.class_name))