Fixed ruby max allowed SAFE level.

lib/kross/ruby/rubyinterpreter.cpp

@@ -86,7 +86,7 @@ RubyInterpreter::RubyInterpreter(Kross::Api::InterpreterInfo* info): Kross::Api:
     {
         rb_set_safe_level( info->getOption("safelevel")->value.toInt() );
     } else {
-        rb_set_safe_level(4); // if the safelevel option is undefined, set it to maximum level
+        rb_set_safe_level(3); // if the safelevel option is undefined, set it to maximum level
     }
 }