[gdome]conformance bug

[Tobias Peters <t-peters gmx de>]

In the following document, the second bar entity is correctly discardet
from the DocumentType::entities list, but the parameter entity "baz" is
contained, although it should not.

<?xml version="1.0"?><!-- comment -->
<!DOCTYPE ex
  PUBLIC "public / external : id" "./DocumentType/system_id.dtd"
[
<!ELEMENT ex EMPTY>
<!NOTATION notate PUBLIC "public notation id">
<!ENTITY foo "foo">
<!ENTITY bar "bar">
<!ENTITY bar "bar2">
<!ENTITY % baz "baz">
]>
<ex/>