Coercion fix

src/org/python/core/PyUnicodeDerived.java

 /* Generated file, do not modify.  See jython/src/templates/gderived.py. */
 package org.python.core;
 
 public class PyUnicodeDerived extends PyUnicode implements Slotted {
 
     public PyObject getSlot(int index) {
         return slots[index];
     }
 
     public void setSlot(int index,PyObject value) {
@@ skipping 1108 matching lines @@
             if (res==null||res==Py.None)
                 return res;
             if (!(res instanceof PyTuple))
                 throw Py.TypeError("coercion should return None or 2-tuple");
             return((PyTuple)res).getArray();
         }
         return super.__coerce_ex__(o);
     }
 
 }