import statements are not emitted for enums.

[GoogleCodeExporter]

What steps will reproduce the problem?
1. create a .proto file "enum.proto" which contains an enum
2. create a .proto"message.proto", which imports & uses the enum in enum.proto.
3. protoc message.proto

What is the expected output? What do you see instead?

one would expect the resultant message.as file to import enum.as, but it does 
not.

Please provide any additional information below.

note that to get protoc to even emit enum.proto in the first place you need to 
include a non-
enum message (a no-op message, you could say) in enum.proto.

Original issue reported on code.google.com by DocOce...@gmail.com on 26 Feb 2010 at 9:08