Ticket #7887: empty-constants.diff

django/template/__init__.py

@@ -487 +487 @@
                 var, constant, i18n_constant = match.group("var", "constant", "i18n_constant")
                 if i18n_constant:
                     var = '"%s"' %  _(i18n_constant.replace(r'\"', '"'))
-                elif constant:
+                elif constant is not None:
                     var = '"%s"' % constant.replace(r'\"', '"')
                 upto = match.end()
                 if var == None: