Don't link to non existing / not accessible namespaces , in CSharp, in the source code

In the following  the 'test' and 'System' were linked in the source code, this should not be the case.

using test;
using System;
using System.IO;

namespace NON
{
}

1 files changed, 1 insertions, 1 deletions

diff --git a/src/code.l b/src/code.l
index 13d538b..5aa333c 100644
--- a/src/code.l
+++ b/src/code.l
@@ -983,7 +983,7 @@ static void generateClassOrGlobalLink(CodeOutputInterface &ol,const char *clName
       }
     }
     NamespaceDef *nd = getResolvedNamespace(className);
-    if (nd)
+    if (nd && nd->isLinkableInProject())
     {
       g_theCallContext.setScope(nd);
       addToSearchIndex(className);