Force all datetime objects to be timezone aware.

This works around some strangeness in the modified datetime class due to
it being derived from a native C object. The timezone was being set to
None in the base class's __new__ function, and the corrected timezone
was ignored when set by the derived class's __init__.

mythtv/bindings/python/MythTV/utility/dt.py

@@ -411,12 +411,22 @@ def duck(cls, t):
                 pass
         raise TypeError("time data '%s' does not match supported formats"%t)
 
-    def __init__(self, year, month, day, hour=None, minute=None, second=None,
-                       microsecond=None, tzinfo=None):
+    def __new__(cls, year, month, day, hour=None, minute=None, second=None,
+                      microsecond=None, tzinfo=None):
+
         if tzinfo is None:
-            tzinfo = self.localTZ()
-        super(datetime, self).__init__(year, month, day, hour, minute, second,\
-                                       microsecond, tzinfo)
+            kwargs = {'tzinfo':cls.localTZ()}
+        else:
+            kwargs = {'tzinfo':tzinfo}
+        if hour is not None:
+            kwargs['hour'] = hour
+        if minute is not None:
+            kwargs['minute'] = minute
+        if second is not None:
+            kwargs['second'] = second
+        if microsecond is not None:
+            kwargs['microsecond'] = microsecond
+        return _pydatetime.__new__(cls, year, month, day, **kwargs)
 
     def mythformat(self):
         return self.astimezone(self.UTCTZ()).strftime('%Y%m%d%H%M%S')