DateTime.DateTime.equalTo now breaks with string argument

[perrinjerome]

BUG/PROBLEM REPORT / FEATURE REQUEST

Since DateTime 5.2, using DateTime.DateTime.equalTo with something else than a DateTime or a number throws AttributeError. This is a regression from #54 ( cc @fdiary )

What I did:

>>> import DateTime
>>> DateTime.DateTime() == ""
False
>>> DateTime.DateTime().equalTo("")
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "./DateTime/src/DateTime/DateTime.py", line 1295, in equalTo
    return self._micros == t._micros
AttributeError: 'str' object has no attribute '_micros'

What I expect to happen:

DateTime.DateTime().equalTo("") should be False

What actually happened:

AttributeError: 'str' object has no attribute '_micros'

What version of Python and Zope/Addons I am using:

This is current master branch 955f3b9