Bug 152074

build 126 (20081031)

From the following codes, 
- right click on the class name (Fruits, Apple, or Orange) 
- select Find Usages
- check 'Find All Subtypes' or 'Find Direct Subtypes Only'
- click Find button
result: Find Usages dialog indicates the following warning message. See attached ide log file for exception.
Module Python Editor threw java.lang.NullPointerException. Please report a bug against Python Editor module and attach
your var/log/messages.log.

class Fruits:
    def __init__ (self, name, info):
        self.name = name
        self.info = info

    def getname(self):
        return self.name

class Apple(Fruits):
    def getinfo(self):
        return self.info

class Orange(Fruits):
    def getinfo(self):
        return self.info