Fix Luacontroller’s print() (#422)

numberZero · web-flow · commit d4e05f33afc9 · 2018-07-23T15:53:32.000+03:00
Because of working inside the sandbox, it was unable to print tables.
diff --git a/mesecons_luacontroller/init.lua b/mesecons_luacontroller/init.lua
@@ -198,7 +198,11 @@ end
 -------------------------
 
 local function safe_print(param)
+	local string_meta = getmetatable("")
+	local sandbox = string_meta.__index
+	string_meta.__index = string -- Leave string sandbox temporarily
 	print(dump(param))
+	string_meta.__index = sandbox -- Restore string sandbox
 end
 
 local function safe_date()
