* src/Date.py (__cmp__): check for Date instance before compare

* src/plugins/DetAncestralReport.py: fixed i18n strings
* src/ReadGedcom.py: handle FTM style of child/parent relationship
translation
* src/gedcomimport.py:


svn: r4403

gramps2/src/Date.py

@@ -135,7 +135,10 @@ class Date:
         Comparison function. Allows the usage of equality tests.
         This allows you do run statements like 'date1 <= date2'
         """
-        return cmp(self.sortval,other.sortval)
+	if isinstance(other,Date):
+            return cmp(self.sortval,other.sortval)
+	else:
+            return -1
 
     def is_equal(self,other):
         """