Add some test when we generate the title to have a nice one (without unconsistent space char)

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@2453 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Person.py

@@ -136,11 +136,11 @@ etc.)."""
       """
       if self.title == '':
         name_list = []
-	if self.getFirstName():
+	if self.getFirstName() not in (None, ''):
           name_list.append(self.getFirstName())
-	if self.getMiddleName():
+	if self.getMiddleName() not in (None, ''):
           name_list.append(self.getMiddleName())
-	if self.getLastName():
+	if self.getLastName() not in (None, ''):
           name_list.append(self.getLastName())
         return ' '.join(name_list)
       else: