issue #9602: Link to namespace in TAGFILES is not resolved with EXTRACT_ALL=NO

Author: doxygen

src/definition.cpp

@@ -1351,7 +1351,7 @@ QCString DefinitionImpl::navigationPathAsString() const
     result+=(toFileDef(m_impl->def))->getDirDef()->navigationPathAsString();
   }
   result+="<li class=\"navelem\">";
-  if (m_impl->def->isLinkable())
+  if (m_impl->def->isLinkableInProject())
   {
     if (m_impl->def->definitionType()==Definition::TypeGroup &&
         !toGroupDef(m_impl->def)->groupTitle().isEmpty())

src/doxygen.cpp

@@ -1713,8 +1713,9 @@ static void buildNamespaceList(const Entry *root)
           {
             nd->setLanguage(root->lang);
           }
-          if (root->tagInfo()==0 && nd->isLinkableInProject()) // if we found the namespace in a tag file
-            // and also in a project file, then remove
+          if (root->tagInfo()==0 && nd->isReference() && !(root->doc.isEmpty() && root->brief.isEmpty()))
+            // if we previously found namespace nd in a tag file and now we find a
+            // documented namespace with the same name in the project, then remove
             // the tag file reference
           {
             nd->setReference("");