Fix Lua stack issue
Fix Lua stack issue

When an error occurs, the error message need to be poped.

nabilbendafi/haka,LubyRuffy/haka,haka-security/haka,Wingless-Archangel/haka,haka-security/haka,lcheylus/haka,lcheylus/haka,lcheylus/haka,nabilbendafi/haka,haka-security/haka,nabilbendafi/haka,LubyRuffy/haka,Wingless-Archangel/haka