Minor to make interpreterInfo.py safer for older versions of python.
Minor to make interpreterInfo.py safer for older versions of python.

akurtakov/Pydev,fabioz/Pydev,rajul/Pydev,rajul/Pydev,rgom/Pydev,rajul/Pydev,aptana/Pydev,akurtakov/Pydev,rgom/Pydev,rajul/Pydev,rajul/Pydev,RandallDW/Aruba_plugin,aptana/Pydev,fabioz/Pydev,rgom/Pydev,rajul/Pydev,RandallDW/Aruba_plugin,RandallDW/Aruba_plugin,rgom/Pydev,rgom/Pydev,fabioz/Pydev,fabioz/Pydev,RandallDW/Aruba_plugin,akurtakov/Pydev,rgom/Pydev,aptana/Pydev,akurtakov/Pydev,RandallDW/Aruba_plugin,fabioz/Pydev,fabioz/Pydev,akurtakov/Pydev,RandallDW/Aruba_plugin,akurtakov/Pydev