More bugfix

information/models.py

@@ -21,7 +21,7 @@ class InformationLocale(models.Model):
     @staticmethod
     def get_information_locale_with_fallback(information_id, language_code=translation.get_language()):
         if information_id == None:
-            return ""
+            return None
         # Try with user's preferred locale first
         try:
             return InformationLocale.objects.get(
@@ -50,4 +50,8 @@ class InformationLocale(models.Model):
     
     @staticmethod
     def get_heading_with_fallback(information_id, language_code=translation.get_language()):
-        return InformationLocale.get_information_locale_with_fallback(information_id, language_code).headline
\ No newline at end of file
+        information_locale = InformationLocale.get_information_locale_with_fallback(information_id, language_code)
+        if information_locale == None:
+            return ""
+        else:
+            return InformationLocale.get_information_locale_with_fallback(information_id, language_code).headline
\ No newline at end of file