* fixed a bug in resolving external references for classtree and whatever else
   uses findelement.
   
   A reference was checked against TPasModule with "=", ruling out descendants
   like TPasExternalModule. All "content" (.xct) symbols are in externalmodules



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24277 3ad0048d-3df7-0310-abae-a5850022a9f2