forgot to add theme version fixes (bug 901604)

apps/addons/models.py

@@ -631,7 +631,7 @@ class Addon(amo.models.OnChangeMixin, amo.models.ModelBase):
             # If there are no versions, just create one and go.
             if not self._current_version:
                 if self._latest_version:
-                    self.update(_current_version=_latest_version,
+                    self.update(_current_version=self._latest_version,
                                 _signal=False)
                 return True
             return False

apps/addons/tests/test_models.py

@@ -1438,7 +1438,10 @@ class TestBackupVersion(amo.tests.TestCase):
         assert self.addon._current_version
 
         # Test latest version copied to current version if no current version.
-        self.addon.update(_current_version=None, _signal=False)
+        self.addon.update(_current_version=None,
+                          _latest_version=Version.objects.create(
+                              addon=self.addon, version='0'),
+                          _signal=False)
         assert self.addon.update_version()
         assert self.addon._current_version == self.addon._latest_version