Return a person search string instead of bombing out if there are multiple identical names where one don't have an active email address.

 - Legacy-Id: 13245

Author: levkowetz

ietf/person/fields.py

@@ -17,7 +17,7 @@ def format_email(e):
         return escape(u"%s <%s>" % (e.person.name, e.address))
     def format_person(p):
         if p.name_count > 1:
-            return escape('%s (%s)' % (p.name,p.email().address))
+            return escape('%s (%s)' % (p.name,p.email().address if p.email() else 'no email address'))
         else:
             return escape(p.name)