Fixed ruby max allowed SAFE level.

diff --git a/lib/kross/ruby/rubyinterpreter.cpp b/lib/kross/ruby/rubyinterpreter.cpp
index 8617d5f..7e09106 100644
--- a/lib/kross/ruby/rubyinterpreter.cpp
+++ b/lib/kross/ruby/rubyinterpreter.cpp
@@ -86,7 +86,7 @@
     {
         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
     }
 }