Allow a null FieldDescriptor array so that a dummy FieldMask can be  created which let's anything go
Allow a null FieldDescriptor array so that a dummy FieldMask can be 
created which let's anything go


git-svn-id: 64ebf368729f38804935acb7146e017e0f909c6b@2279 6335cc39-0255-0410-8fd6-9bcaacd3b74c

samskivert/samskivert,samskivert/samskivert