Importing a file without java_package stopped to work in 1.4.0

[davidlar]

Example:

to-import.proto:

package to.import;

message ToImport {
  required int32 required_field = 1;
}

importer.proto

package importer;

import "to-import.proto";

message Importer {
  required ToImport required_field = 1;
}

This will now create a Importer.scala with a ToImport without package name, which won't compile.

Pull request #107 fixes this (hopefully).

Regards David