Please review fix for issue #224688 - Long recursion during finding prototype chain

Please review the fix for issue

#224688 - Long recursion during finding prototype chain
http://netbeans.org/bugzilla/show_bug.cgi?id=224688

For resolving types in JS Editor has to be counted prototype chain of 
the types. In the current situation there can be cases when the counting 
of the prototype chain through recursion can be never ending. The issue 
has attached file, where it can be reproduce.

As the result of such case is OutOfMemoryException.

The fix is save, no risk. It doesn't influence other functionality.

Petr Hejl reviews the fix. http://hg.netbeans.org/web-main/rev/c9ab1248b1f0


Thanks,
Petr