forgot to commit this

Plugin/Crack.cpp

@@ -115,6 +115,9 @@ PView *GMSH_CrackPlugin::execute(PView *view)
       for(int j = 0; j < crackElements[i]->getNumVertices(); j++){
         MVertex *v = crackElements[i]->getVertex(j);
         crackVertices.insert(v);
+      }
+      for(int j = 0; j < crackElements[i]->getNumPrimaryVertices(); j++){
+        MVertex *v = crackElements[i]->getVertex(j);
         if(bndVertices.find(v) == bndVertices.end())
           bndVertices.insert(v);
         else